Information about the make, model, and alternative names of the specific device, if available.
Design
Information about the dimensions and weight of the device, presented in different units of measurement. Materials used, colors offered, certificates.
| Width Width information - refers to the horizontal side of the device in its standard orientation during use. | 76 mm (millimeters) 7.6 cm (centimeters) 0.25 ft (feet) 2.99 in (inches) |
| Height Height information - refers to the vertical side of the device in its standard orientation during use. | 151 mm (millimeters) 15.1 cm (centimeters) 0.5 ft (feet) 5.94 in (inches) |
| Thickness Information about the thickness of the device in different units measurements. | 8.35 mm (millimeters) 0.84 cm (centimeters) 0.03 ft (feet) 0.33 in (inches) |
| Weight Information about the weight of the device in different units of measurement. | 175 g (grams) 0.39 lbs 6.17 oz (ounces) |
| Volume The approximate volume of the device, calculated based on the dimensions provided by the manufacturer. Refers to devices with the shape of a rectangular parallelepiped. | 95.82 cm³ (cubic centimeters) 5.82 in³ (cubic inches) |
| Colors Information about the colors in which this device is offered for sale. | Grey Silver Golden Black Blue |
| Materials for making the case Materials used to make the device body. | Aluminium alloy |
SIM card
The SIM card is used in mobile devices to store data that certifies the authenticity of mobile service subscribers.
Mobile networks
A mobile network is a radio system that allows multiple mobile devices to communicate with each other.
| GSM GSM (Global System for Mobile Communications) is designed to replace the analogue mobile network (1G). For this reason, GSM is often called a 2G mobile network. It is improved by the addition of GPRS (General Packet Radio Services), and later EDGE (Enhanced Data rates for GSM Evolution) technologies. | GSM 900 MHz GSM 1800 MHz GSM 1900 MHz |
| CDMA CDMA (Code-Division Multiple Access) is a channel access method used in communications in mobile networks. Compared to other 2G and 2.5G standards like GSM and TDMA, it provides more high speeds data transfer and the ability to connect more consumers at the same time. | CDMA 800 MHz |
| W-CDMA W-CDMA (Wideband Code Division Multiple Access) is an air interface used by 3G mobile networks, and is one of the three main air interfaces of UMTS, along with TD-SCDMA and TD-CDMA. It provides even higher data transfer speeds and the ability to connect more consumers at the same time. | W-CDMA 850 MHz W-CDMA 900 MHz W-CDMA 1900 MHz W-CDMA 2100 MHz |
| TD-SCDMA TD-SCDMA (Time Division Synchronous Code Division Multiple Access) is a 3G mobile network standard. It is also called UTRA/UMTS-TDD LCR. It was developed as an alternative to the W-CDMA standard in China by the Chinese Academy of Telecommunications Technology, Datang Telecom and Siemens. TD-SCDMA combines TDMA and CDMA. | TD-SCDMA 1880-1920 MHz TD-SCDMA 2010-2025 MHz |
| LTE LTE (Long Term Evolution) is defined as a fourth generation (4G) technology. It is developed by 3GPP based on GSM/EDGE and UMTS/HSPA to increase the capacity and speed of wireless mobile networks. The subsequent technology development is called LTE Advanced. | LTE 850 MHz LTE 900 MHz LTE 1800 MHz LTE 2100 MHz LTE 2600 MHz LTE-TDD 1900 MHz (B39) LTE-TDD 2300 MHz (B40) LTE-TDD 2500 MHz (B41) LTE-TDD 2600 MHz (B38) |
Mobile communication technologies and data transfer speeds
Communication between devices on mobile networks is carried out using technologies that provide different data transfer rates.
Operating system
An operating system is a system software that manages and coordinates the operation of hardware components in a device.
SoC (System on Chip)
A system on a chip (SoC) includes all the most important hardware components of a mobile device on one chip.
| SoC (System on Chip) A system on a chip (SoC) integrates various hardware components, such as a processor, graphics processor, memory, peripherals, interfaces, etc., as well as the software necessary for their operation. | MediaTek Helio X20 (MT6797) |
| Technological process Information about technological process, on which the chip is made. Nanometers measure half the distance between elements in the processor. | 20 nm (nanometers) |
| Processor (CPU) Primary function of the processor (CPU) mobile device is the interpretation and execution of instructions contained in software applications. | 2x 2.1 GHz ARM Cortex-A72, 4x 1.85 GHz ARM Cortex-A53, 4x 1.4 GHz ARM Cortex-A53 |
| Processor size The size (in bits) of a processor is determined by the size (in bits) of the registers, address buses, and data buses. 64-bit processors have higher performance compared to 32-bit processors, which in turn are more powerful than 16-bit processors. | 64 bit |
| Instruction Set Architecture Instructions are commands with which the software sets/controls the operation of the processor. Information about the instruction set (ISA) that the processor can execute. | ARMv8-A |
| Number of processor cores The processor core performs program instructions. There are processors with one, two or more cores. Having more cores increases performance by allowing multiple instructions to be executed in parallel. | 10 |
| CPU clock speed The clock speed of a processor describes its speed in terms of cycles per second. It is measured in megahertz (MHz) or gigahertz (GHz). | 2100 MHz (megahertz) |
| Graphics Processing Unit (GPU) The Graphics Processing Unit (GPU) handles calculations for various 2D/3D graphics applications. In mobile devices, it is most often used by games, consumer interfaces, video applications, etc. | ARM Mali-T880 MP4 |
| Number of cores GPU Like a CPU, a GPU is made up of several working parts called cores. They handle graphics calculations for various applications. | 4 |
| GPU clock speed Running speed is the clock speed of the GPU, measured in megahertz (MHz) or gigahertz (GHz). | 780 MHz (megahertz) |
| Amount of random access memory (RAM) RAM(RAM) in use operating system and all installed applications. Data stored in RAM is lost after the device is turned off or restarted. | 3 GB (gigabytes) 4 GB (gigabytes) |
| Type of random access memory (RAM) Information about the type of random access memory (RAM) used by the device. | LPDDR3 |
| Number of RAM channels Information about the number of RAM channels that are integrated into the SoC. More channels mean higher data rates. | Dual channel |
| RAM frequency The frequency of RAM determines its operating speed, more specifically, the speed of reading/writing data. | 800 MHz (megahertz) |
Built-in memory
Each mobile device has built-in (non-removable) memory with a fixed capacity.
Memory cards
Memory cards are used in mobile devices to increase the storage capacity for storing data.
Screen
The screen of a mobile device is characterized by its technology, resolution, pixel density, diagonal length, color depth, etc.
| Type/technology One of the main characteristics of the screen is the technology by which it is made and on which the quality of the information image directly depends. | IPS |
| Diagonal For mobile devices, screen size is expressed by the length of its diagonal, measured in inches. | 5.5 in (inches) 139.7 mm (millimeters) 13.97 cm (centimeters) |
| Width Approximate screen width | 2.7 in (inches) 68.49 mm (millimeters) 6.85 cm (centimeters) |
| Height Approximate screen height | 4.79 in (inches) 121.76 mm (millimeters) 12.18 cm (centimeters) |
| Aspect Ratio The ratio of the dimensions of the long side of the screen to its short side | 1.778:1 16:9 |
| Permission Screen resolution shows the number of pixels vertically and horizontally on the screen. More a high resolution means sharper detail in the image. | 1080 x 1920 pixels |
| Pixel Density Information about the number of pixels per centimeter or inch of the screen. Higher density allows information to be displayed on the screen with clearer detail. | 401 ppi (pixels per inch) 157 ppcm (pixels per centimeter) |
| Color depth Screen color depth reflects the total number of bits used for color components in one pixel. Information about the maximum number of colors that the screen can display. | 24 bit 16777216 flowers |
| Screen area Approximate percentage of screen area occupied by the screen on the front of the device. | 72.9% (percentage) |
| Other characteristics Information about other screen features and characteristics. | Capacitive Multi-touch Scratch resistance |
| 2.5D curved glass screen 1000:1 contrast ratio 450 cd/m² 72% NTSC |
Sensors
Different sensors perform different quantitative measurements and convert physical indicators into signals that a mobile device can recognize.
Main camera
The main camera of a mobile device is usually located on the back of the body and is used for taking photos and videos.
| Sensor model | Samsung S5K3L8 |
| Sensor type | ISOCELL |
| Sensor size | 4.69 x 3.52 mm (millimeters) 0.23 in (inches) |
| Pixel size | 1.127 µm (micrometers) 0.001127 mm (millimeters) |
| Crop factor | 7.38 |
| ISO (light sensitivity) ISO indicators determine the level of light sensitivity of the photosensor. A lower indicator means weaker photosensitivity and vice versa - higher indicators mean higher photosensitivity, i.e. best ability sensor work in low light conditions. | 100 - 1600 |
| Diaphragm | f/2 |
| Focal length | 3.5 mm (millimeters) 25.82 mm (millimeters) *(35 mm / full frame) |
| Flash type The most common types of flashes in mobile device cameras are LED and xenon flashes. LED flashes produce softer light and, unlike brighter xenon flashes, are also used for video shooting. | Double LED |
| Image Resolution One of the main characteristics of mobile device cameras is their resolution, which shows the number of horizontal and vertical pixels in the image. | 4160 x 3120 pixels 12.98 MP (megapixels) |
| Video resolution Information about the maximum supported resolution when shooting video with the device. | 1920 x 1080 pixels 2.07 MP (megapixels) |
Information about the maximum number of frames per second (fps) supported by the device when shooting video at the maximum resolution. Some of the main standard video shooting and playback speeds are 24p, 25p, 30p, 60p. | 30fps (frames per second) |
| Characteristics Information about other software and hardware features related to the main camera and improving its functionality. | Autofocus Continuous shooting Digital zoom Geographical tags Panoramic photography HDR shooting Touch Focus Face recognition White Balance Adjustment ISO Setting Exposure compensation Self-timer Scene Selection Mode |
| Phase detection 5-element lens 720p@120fps |
Additional camera
Additional cameras are usually mounted above the device screen and are used mainly for video conversations, gesture recognition, etc.
| Sensor model Information about the manufacturer and model of the photo sensor used in the device's camera. | Samsung S5K5E8 |
| Sensor type Digital cameras use photo sensors to take photographs. The sensor, as well as optics, are one of the main factors in the quality of the camera in a mobile device. | CMOS BSI (backside illumination) |
| Sensor size Information about the dimensions of the photosensor used in the device. Typically, cameras with larger sensors and lower pixel densities offer higher image quality despite the lower resolution. | 2.9 x 2.15 mm (millimeters) 0.14 in (inches) |
| Pixel size The smaller pixel size of the photosensor allows more pixels per unit area, thereby increasing resolution. On the other hand, a smaller pixel size may have a negative impact on image quality when high levels photosensitivity (ISO). | 1.133 µm (micrometers) 0.001133 mm (millimeters) |
| Crop factor The crop factor is the ratio between the dimensions of the full-frame sensor (36 x 24 mm, equivalent to a frame of standard 35 mm film) and the dimensions of the device's photosensor. The indicated number represents the ratio of the diagonals of the full-frame sensor (43.3 mm) and the photosensor specific device. | 11.99 |
| Diaphragm Aperture (f-number) is the size of the aperture opening that controls the amount of light reaching the photosensor. A lower f-number means the aperture opening is larger. | f/2 |
| Focal length Focal length is the distance in millimeters from the photosensor to the optical center of the lens. The equivalent focal length is also indicated, providing the same field of view with a full frame camera. | 3.5 mm (millimeters) 41.95 mm (millimeters) *(35 mm / full frame) |
| Image Resolution Information about the maximum resolution of the additional camera when shooting. In most cases, the resolution of the secondary camera is lower than that of the main camera. | 2560 x 1920 pixels 4.92 MP (megapixels) |
| Video resolution Information about the maximum supported video resolution additional camera. | 1280 x 720 pixels 0.92 MP (megapixels) |
| Video - frame rate/frames per second. Information about the maximum number of frames per second (fps) supported by the secondary camera when shooting video at the maximum resolution. | 30fps (frames per second) |
Audio
Information about the type of speakers and audio technologies supported by the device.
Location determination
Information about the navigation and location technologies supported by your device.
WiFi
Wi-Fi is a technology that provides wireless communication for transmitting data over close distances between various devices.
Bluetooth
Bluetooth is a standard for secure wireless data transfer between various devices of different types over short distances.
USB
USB (Universal Serial Bus) is an industry standard that allows different electronic devices to exchange data.
Headphone jack
This is an audio connector, also called an audio jack. The most widely used standard in mobile devices is the 3.5mm headphone jack.
Connecting devices
Information about other important connection technologies supported by your device.
Browser
A web browser is a software application for accessing and viewing information on the Internet.
| Browser Information about some of the main characteristics and standards supported by the device's browser. | HTML HTML5 CSS 3 |
Audio file formats/codecs
Mobile devices support different audio file formats and codecs, which respectively store and encode/decode digital audio data.
Video file formats/codecs
Mobile devices support different video file formats and codecs, which respectively store and encode/decode digital video data.
Battery
Mobile device batteries differ from each other in their capacity and technology. They provide the electrical charge necessary for their functioning.
| Capacity A battery's capacity indicates the maximum charge it can hold, measured in milliamp-hours. | 4100 mAh (milliamp-hours) |
| Type The type of battery is determined by its structure and, more precisely, the chemicals used. Exist different types batteries, with lithium-ion and lithium-ion polymer batteries most often used in mobile devices. | Li-polymer |
| Adapter output power Power Information electric current(measured in amperes) and electrical voltage(measured in volts) supplied Charger (output power). Higher power output ensures faster battery charging. | 5 V (volts) / 2 A (amps) |
| Characteristics Information about some additional characteristics device battery. | Fast charging Fixed |
| Battery model: BN43 |
Specific Absorption Rate (SAR)
The SAR level refers to the amount of electromagnetic radiation absorbed by the human body while using a mobile device.
| Head SAR level (EU) The SAR level indicates the maximum amount electromagnetic radiation to which the human body is exposed when holding a mobile device next to the ear in a conversation position. In Europe, the maximum permissible SAR value for mobile devices is limited to 2 W/kg per 10 grams of human tissue. This standard established by the CENELEC Committee in accordance with IEC standards, subject to the ICNIRP guidelines of 1998. | 0.724 W/kg (Watt per kilogram) |
| Body SAR level (EU) The SAR level indicates the maximum amount of electromagnetic radiation to which the human body is exposed when holding a mobile device at hip level. The maximum permissible SAR value for mobile devices in Europe is 2 W/kg per 10 grams of human tissue. This standard has been established by the CENELEC Committee in compliance with the ICNIRP 1998 guidelines and IEC standards. | 0.674 W/kg (Watt per kilogram) |
| Head SAR level (US) The SAR level indicates the maximum amount of electromagnetic radiation that the human body is exposed to when holding a mobile device near the ear. The maximum value used in the USA is 1.6 W/kg per 1 gram of human tissue. Mobile devices in the US are regulated by the CTIA, and the FCC conducts tests and sets their SAR values. | 0.85 W/kg (Watt per kilogram) |
| Body SAR level (US) The SAR level indicates the maximum amount of electromagnetic radiation to which the human body is exposed when holding a mobile device at hip level. The highest permissible SAR value in the USA is 1.6 W/kg per 1 gram of human tissue. This value is set by the FCC, and the CTIA monitors mobile devices' compliance with this standard. | 0.69 W/kg (Watt per kilogram) |
Redmi Note 4 is the 11th smartphone released by Xiaomi in 2016. It would seem that the mid-budget segment is already quite saturated with offers from this manufacturer. For example, relatively recently the market for affordable devices was “stormed” by the Redmi Note 3 Pro. Not everyone had yet managed to buy this device when the Redmi line was replenished with another phablet.
Now it remains to be seen whether the new product will compare favorably with its predecessor in terms of design, hardware, stability and cost. The first thing that might interest a potential buyer is Xiaomi Redmi Note 4 is equipped with a 10-core processor. And the price is more than attractive: from 167 USD for the 16 GB version. The 64 GB version will cost at least $222. Prices are current at the time of this review.
Characteristics of Xiaomi Redmi Note 4
The smartphone has quite serious hardware for its price category.
Appearance, connectors, buttons and sensors
The smartphone has an “all-metal” design: connoisseurs of high-quality assembly approve. The metal of the case is matte and does not slip in the hand. Instead of plastic inserts, there are much thinner plastic seams. The display and front panel are covered with 2.5D glass.
Color variations: silver/golden back panel combined with a white front panel, and gray “back” combined with a dark front panel. The back part is almost exactly the same as the top Redmi Pro, only a fingerprint scanner is installed in place of the second camera. There are no complaints about the speed and correct operation of the sensor.
Pronounced curves along the edges of the rear panel have a positive effect on the comfort of one-handed grip. A thin shiny edging emphasizes the oblique cut at the ends, adding extra charm to the design.
Touch navigation buttons are located at the bottom of the screen. They are illuminated very dimly, but this is enough for use in the dark. An event indicator light is installed above the screen in the right corner.The combined SIM card tray and flash drive slot is located on the left side, the power and volume control buttons are on the right.
On the bottom edge there is a MicroUSB connector (with OTG support), and on the sides of it there are neat holes. The fact that on the right is a speaker, on the left is a microphone. On the top edge there is a second microphone, an infrared port and a 3.5 mm audio jack.
Bottom line: visually and tactilely, Note 4 is perceived much better than its predecessor.
CPU
The hardware is based on top-end MediaTek processor Helio X20 (64 bit, 10 cores). “Impact” performance is provided by 2 Cortex-A72 cores with a frequency of 2.1 GHz. The remaining 8 Cortex-A53 cores are less powerful and are distributed to process tasks that do not require high computing power. The graphics chip used is not the weak Mali-T880 MP4. The results of the synthetic performance test are also impressive: up to 85 thousand points in Antutu.
The characteristics “on paper” and the numbers in benchmarks are impressive. But reality is much more important. For this particular device, the importance of 10 cores is greatly overestimated. Yes, the smartphone easily copes with any everyday tasks, the system interface works quickly. However, in the same “tanks” at maximum graphic settings You won't be able to play.
It is generally accepted that throttling is to blame for this situation: when a certain temperature level is reached, the processor automatically lowers the frequency. Naturally, at the expense of performance. In normal operation this is not noticeable, but a drop in FPS in 3D games and accompanying lags are guaranteed. But there will be no problems with overheating here.
Memory
The standard version received 2 GB of RAM and 16 GB of main memory. The extended version has 3 GB of RAM, and the built-in storage is as much as 64 GB. There is a serious gap between versions in the built-in storage capacity. If necessary, the lack of free space for storing your own files can be offset by an external drive in MicroSD format (up to 128 GB). “You just” need to stop using a second SIM card.
Regardless of the amount of RAM (2 or 3 GB), undemanding users will be pleased with the fast and relatively stable operation of the device. But advanced users will encounter a lack of RAM even in the extended version (with 3 GB of RAM). You can run a maximum of 3 applications at the same time. If there are 4 or more of them, they are simply unloaded from RAM. It is impossible to force a smartphone to send notifications even from the most important applications: “protection” against memory overload is triggered.
There are suggestions that the reason lies in insufficiently optimized software. It is possible that future updates will improve the situation.
Autonomous operation
The battery is quite capacious: 4100 mAh. Autonomy is normal, but not outstanding: the charge is enough for 1 day of active use. With a moderate intensity of use - 1.5 days, for thrifty users the battery will last for 2 days. At maximum load, the smartphone can withstand 4-5 hours maximum. Technology fast charging not supported. It will take 2 hours and 25 minutes to fully recharge the charge.
Camera
Great by day, terrible by night: this a brief description of 13-megapixel main camera in Xiaomi Redmi Note 4. A photo module with an f/2.0 aperture is complemented by a flash and fast PDAF autofocus. The interface of the Camera application is no different from others budget models Xiaomi, there is no full-fledged manual mode, only a simplified variation of it with basic capabilities.
There is no noticeable progress in improving shooting quality compared to previous models. During the day, in ideal lighting, you can get detailed pictures with good color rendition. Dynamic range medium, to improve the sharpness of photos, do not forget about the HDR mode.The device copes perfectly with macro photography.
Indoors at artificial lighting A soft noise reduction comes into play, so the level of detail is acceptable.
At night and in the evening, everything is expectedly bad: low detail, blurriness, noise.
Video recording is possible in a resolution of 1920 x 1080 (30 fps). Slow and fast motion shooting in HD resolution (1280 x 720) is supported. Videos are of normal quality, but the device is still better at taking photographs. The front camera (5 MP, f/2.0) produces quite acceptable results with sufficient lighting.
Display
Xiaomi Redmi Note 4 is equipped with a wonderful 5.5-inch IPS OGS display with FullHD resolution (1920 x 1080). The brightness range is wide; at the minimum backlight level, almost nothing is visible during the day, but in complete darkness the screen does not dazzle your eyes. At the maximum value (450 cd/m2), you can safely use your smartphone on a bright sunny day. Viewing angles are good, the loss of contrast can only be noticed when viewed from “extreme” angles.
A cheaper analogue is installed as protective glass Gorilla Glass(manufacturer not specified). In order for the first scratches to appear on the glass, it is enough to walk with the device in your pocket several times. The oleophobic layer is of fairly high quality: your finger glides across the glass with ease, and fingerprints are erased with one movement.
Networking capabilities
The hybrid tray can accommodate 2 SIM cards: one in micro format, the other in nano format (installed instead of a MicroSD flash drive). The smartphone can connect to 2G/3G/4G networks, and one of the SIM cards supports CDMA communication. Available bluetooth module 4.2, and WiFi is capable of operating in two bands: 2.4 and 5 GHz. It's nice to have an IR port that can be used for remote control home appliances. Navigation capabilities: GPS/A-GPS + GLONASS. The device copes well with the role of a navigator, and there are no questions about the operation of all other communications.
Sound
The main multimedia speaker is located on the bottom edge: another small difference from the Redmi Note 3. Thanks to this, the rear panel looks more harmonious. And the incoming call is not muffled when the smartphone is lying on the table with the screen facing up. The sound quality is nothing special, the main thing is that the sound is not flat, and the volume level is average, that is, quite sufficient. The sound in good headphones is clear, loud, and detailed.
Software part
On this moment The smartphone has received an update to the global version of MIUI v8. This is a multilingual version, with Google services, without hieroglyphs and Chinese applications. The shell is based on Android 6.0 OS. It has a nice interface and the ability to flexible settings. At the same time, there are problems with optimizing the firmware (remember the problems with the RAM). During operation, less obvious defects may appear.
However, MIUI is regularly improved and updated. There is no doubt that over time, developers will bring the OS to an almost ideal state.
Individual characteristics
To unlock the display, you no longer need to lift your smartphone from the table and then turn it over to reach the scanner. Now the screen can be activated by double tap.
It is also worth mentioning such innovations as Dual apps and Second Space. The first allows you to “clone” any application in order to log in to it under two different accounts. The second allows you to divide the workspace into 2 profiles: each will have its own design, an individual set of software and its own settings.
Advantages and disadvantages
Pros:
- good design, almost perfect assembly;
- excellent screen for image quality;
- presence of a fingerprint sensor, infrared port, light event indicator;
- software utilities (Dual apps, Second Space, unlock with double tap);
- CDMA support;
- adequate cost.
Minuses:
- severe throttling in games;
- even with three GB of RAM, there is a lack of it (due to crude firmware);
- hybrid slot for SIM and MicroSD.
Who is a smartphone suitable for?
For those who need a beautiful and functional phablet at a reasonable price. Adjusted for the fact that the user is ready to put up with the current instability of the software and does not count on high-quality night shots. It is cost-effective for Xiaomi fans to hold off on purchasing a device until stable firmware is released. Or skip the “four” altogether, waiting for the next model.
Our review of the Xiaomi Redmi Note 4 smartphone
No serious innovations have been noticed compared to Redmi Note 3 PRO. That is, owners of the third version make no sense to pay attention to the “four”. It’s another matter if we consider the Xiaomi Redmi Note 4 as an independent device and do not make comparative analogies. In this case, this is a very successful smartphone worthy of attention.
This review of Xiaomi Redmi Note 4 64gb will help you decide whether this model is worth taking as an option to upgrade your smartphone.
We will dwell in detail on technical specifications and find out what practicality is hidden behind all the indicators of the gadget.
Characteristics:
- Screen: , 5.5″, 1920×1080, 401 ppi, capacitive, multi-touch
- Processor: MediaTek Helio X20 64-bit, 10-core, 2.1 GHz
- Graphics accelerator: Mali-T880 MP4
- Operating system: Android 6.0 Marshmallow with MIUI 8 interface
- RAM: 2 GB
- Built-in memory: 16 GB
- Communication: GSM: 850/900/1800/1900 MHz || UMTS: 850/900/1900/2000/2100 MHz || LTE: 1, 3, 5, 7, 38, 39, 40, 41
- SIM: Nano-SIM+Micro-SIM, Dual SIM Dual Standby (DSDS)
- Wireless interfaces: Wi-Fi 802.11 a/b/g/n/ac, Bluetooth 4.2 LE, IR port
- Navigation: GPS, GLONASS
- Cameras: main - 13 MP (phase autofocus, two-color LED flash), front - 5 MP
- Sensors: light, proximity, gyroscope, compass, fingerprint scanner
- Battery: 4100 mAh, non-removable
- Dimensions: 151x76x8.3 mm
- Weight: 175 grams
Packaging and equipment
In the white box along with the Xiaomi Redmi Note 4 we will find the standard “gentleman’s kit” of the new smartphone. The package includes:
- Xiaomi Redmi Note 4 phone covered with protective films.
- Warranty card
- Instruction book
- Paperclip (to open the SIM card tray)
- standard black Micro-USB to USB cable
- standard charger 5V/2A
Xiaomi Redmi Note 4 design
The phone looks nice and even expensive. The all-metal nature of the case and the plastic seams for the antenna leads look quite solid.
For the most part appearance The smartphone is inherited from its older brother with minor changes.
Namely: only one camera module is installed, as well as a slightly simpler screen in terms of color reproduction.
The arrangement of buttons and other elements along the body is standard: on the right we will find the power button and volume control, on the left there are connectors for SIM cards.
A Micro-USB connector is installed at the bottom end.
Experts have different preferences regarding the type of connector.
Some people think that this phone model should be “armed” with a type connector, while others talk about the practicality and versatility of the Micro-USB connector.
Xiaomi Redmi Note 4 combines these traditional smartphone design features with a number of features:
Touch buttons. Touch buttons have appeared on the front panel, which can roughly be called “Menu”, “Back”, “Exit”.
Fingerprint's scanner. Located on the back panel under the camera
Symmetry.
The aforementioned solidity of the case seems to be achieved due to the symmetry of the arrangement of all elements.
Upon closer examination, you will find, for example, symmetry in the position of the front and sensor window in relation to the earpiece slot.
The same applies to the end elements.
In addition to the fact that the phone with all the above-mentioned delights is also comfortable to hold, the design of Xiaomi Redmi Note 4 deserves a solid “A”.
Screen
The quality and usability of the Xiaomi Redmi Note 4 display is generally a controversial issue.
From a purely technical point of view, the screen is very good for such a budget device.
The matrix supports FULL HD resolution, the picture looks smooth and good under any circumstances, the viewing angle is quite wide.
The screen sensitivity is good and supports up to 10 touches simultaneously.
The screen also has nice features, such as a “reading mode” with dimmed brightness and a very convenient “software screen reduction” function.
“Software screen reduction” is a function that reduces the working windows to such a size that the phone can be easily operated with one hand.
But what the display can be criticized for is its contrast and insufficient color depth.
Despite the wide brightness range, the screen falls short in these areas.
So on a bright sunny day, working with Xiaomi Redmi Note 4 on the street is unlikely to be comfortable.
Another “pain point” of the screen is its protection.
The matrix is covered with slightly convex glass with an oleophobic coating, which you should not count on in extreme situations.
Also, many users of this model note that the screen is easily scratched.
In the overall picture, the Xiaomi Redmi Note 4 display has the following pros and cons:
pros
- FULL HD resolution and smooth image
- Good sensor
- Good viewing angle
- “Software screen reduction” makes the smartphone convenient in any circumstances.
Minuses
- Insufficient color depth and contrast
- Weak protection
Although Xiaomi screen Redmi Note 4 can hardly be considered an advantage of the gadget; nevertheless, its shortcomings are not critical enough to abandon this phone.
Especially against the backdrop of an excellent FULL-HD matrix with a wide viewing angle.
The camera equipped with the Xiaomi Redmi Note 4 smartphone can be classified as a conventional “regular camera”.
Available modes:
HDR mode
Manual mode
Flash mode
To Work with system settings made easier thanks to the search bar. Now you don’t need to “shovel” the entire menu in search of the desired parameter.
Second space
The interface also offers interesting feature"Second space".
Figuratively speaking, you can create a second smartphone inside a smartphone, with your own settings, contacts and all the parameters.
This option will be very useful if two people use one phone.
Xiaomi Redmi Note 4 is very easy to use and easy to set up.
This smartphone will perform excellently in situations where you need to react quickly.
Performance
If we talk about the “filling”, then the Xiaomi Redmi Note 4 assembly is optimal for this price.
Hidden inside the case is a ten-core Helio processor and a good Mali-T880 MP4 video accelerator.
In fact, this means that the average user will have more than enough performance reserves.
Let's take a closer look at what the Xiaomi Redmi Note 4 is capable of in specific cases.
- Websurfing. The built-in RAM (3GB) is enough to squeeze everything you can out of the Internet browser without a headache. copes well with a bunch open tabs, flash player and fast scrolling.
- Applications. When working with a large number of applications, Xiaomi Redmi Note 4 can “cough easily”, however, such inconveniences will only occur in case of overload.
- Games. It is worth understanding that Xiaomi Redmi Note 4 is not “tailored” for games at maximum speed.
The video accelerator does not cope well with “heavy” graphics, but this only applies to the “ultra” settings.
In variants with medium and low Xiaomi settings Redmi Note 4 performs well and makes gaming fun quite comfortable with smooth images and excellent FPS.
- Video. Here the smartphone performs excellently. When loading a “heavy” 4K video through a native player, the video plays without any “brakes”, and rewinding also works properly.
- . The design features of the case make the increase in temperature noticeable to the hands, but not critical. It is also worth noting that although the “nimbleness” of the phone decreases due to overheating according to system indicators, in reality this is barely noticeable when working with the phone.
Overall, the performance of the Xiaomi Redmi Note 4 is optimal for those who need a smartphone to make everyday life easier.
Basic “delights” like web surfing, working with applications and watching videos are excellent here, and this gadget can rightfully be classified as “ good quality behind good price».
Price
conclusions
Video review of Xiaomi Redmi Note 4:
It would seem that just recently the Xiaomi company released the Redmi Note 3 phone, and the “four” has already been born. Is it possible to say that the Redmi Note “four” version has some significant difference from the previous phone in the line? Or are there no significant differences, and the whole point is the desire of manufacturers to earn more? You can understand by reading the review on the Arstyle website or reading our honest review Xiaomi Redmi Note 4.
The gadget comes with a USB cable, power adapter and a set of documents. The box, as usual, is not very big. The kit includes instructions for those who are encountering Xiaomi products for the first time and do not know how to operate the phone.
An interesting fact: Xiaomi Redmi 4 in appearance is not at all similar to the “three”, but to the flagship Redmi Pro. Both gadgets come in a solid metal case with plastic inserts. In both places we see identical perforations for the speaker. The only difference is that the Pro version has two cameras and a physical return button. start screen menu. The camera, by the way, is located on the Pro exactly where the manufacturers of the Redmi Note 4 placed the fingerprint scanner.
The front surface of the device accommodates not only the screen, but also the earpiece, front camera and light sensor. Just below the screen there are touch buttons for Home, Back and Menu. Using the keys on the right panel, you can control the volume and lock and turn on the screen. On the left there is a slot for a SIM card or additional card memory.
An audio output, microphone and infrared port are located at the top end. At the bottom there is a connector for a USB cable, and to the right and left of it there are perforations for speakers. There is no MHL standard yet.
Finally, on the back is the already mentioned fingerprint scanner and the main camera lens along with a two-color LED flash.
The classic version of Xiaomi Redmi Note 4 3 is made, oddly enough, not in black. The developers paint the panel white, gold or dark gray, leaving black aside.
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Convenience
Reviewing the Xiaomi Redmi Note 4 smartphone, it should be noted that it is very easy to use. The case does not bend and does not creak when twisted. We feel that the body is made of metal when we take the smartphone in our hand - the device is quite heavy. But I’m glad that the metal is truly reliable. This is an excellent aluminum alloy. In Redmi Note 3, the metal is an order of magnitude thinner, which can be felt to the touch.
The screen dimensions remained at the usual level - 5.5 inches. It’s good that all the connectors remain in their usual places, and you won’t have to relearn how to use the phone. After just a short time of working with the gadget, you can easily find all the physical buttons blindly. The touch buttons are backlit.
Let's say a few words about the fingerprint sensor. The finger fits perfectly on it, and the system can recognize not only the index finger, but any other finger.
Display
The screen of the fourth Note recognizes up to 10 touches simultaneously. Its resolution is 1920x1080 pixels with a density of 401 ppi. To protect the screen, 2.5D rounded glass is applied to its surface. An oleophobic coating is applied on top.
Xiaomi Redmi Note 4 global version will delight its owners with a thoughtfully crafted screen. Good visibility is ensured at any level of illumination. The colors are clear and rich, with the right level of contrast. You can change the display settings color temperature from cold to warm shades and back, or use the reading mode, which will automatically block ultraviolet radiation. If desired, reading mode can be turned on automatically through certain applications.
In general, Xiaomi has once again pleased us with its smartphone screen. This is already becoming a trademark of the manufacturer.
Interface
The phone works on the basis software Android 6.0 under the proprietary MIUI 8 interface. The standard firmware includes several main languages, including Russian. There are a minimum of additional programs - only the most basic ones are included. This is good because the user can always go to Google Play and download the application he needs.
Traditionally for MIUI, all applications are located on desktops. There is no limit to their number, so create as many as you like. For convenience, you can also sort applications into folders.
Through the settings it is possible to set the “Light Mode” menu. It assumes that the user will see large icons of only the applications that are most needed to use. There is also a Second Space mode. If it is activated, a full-fledged duplicate of the interface will be created, and in it all applications and data will be different. This is convenient if two people use the same phone, or the same user uses the gadget both at work and in his personal life. The second profile has its own memory section, so that data located in different profiles will not be mixed. To quickly switch from one profile to another, just click on the Switch icon. At the request of the phone owner, switching can only occur if the procedure is confirmed via a password or fingerprint.
By swiping left or right side The “Home” button activates the “one-handed mode”, in which a smaller screen appears, convenient for operation with one hand. An irreplaceable thing, especially if you have to use the phone while holding the handrail in transport.
Specifications
Don't look for the Xiaomi Redmi Note 4 Snapdragon 625 - the manufacturer of this gadget decided to use the MediaTek Helio X20 processor. At the presentation of the new product, company representatives said that the performance of the fourth model in the line will be approximately 60% higher than that of the third, and at the same time, energy consumption for the operation of the gadget will be reduced by a third.
A decent level of graphics is provided by the quad-core Mali-T880 MP4 accelerator. There is only 2 GB of RAM, 16 GB of built-in memory, of which the user can actually fill up to 11 GB. Of course, this is not enough, but you can additionally buy a memory card up to 128 GB. The slot for it is combined with a slot for a SIM card, so you need to choose either a second card for communication or a memory card.
An improved modification of the model assumes the presence of 3 GB of RAM and 64 GB of internal memory. There is no configuration with 32 GB of internal memory. The market demand for Redmi Note 4 64 Gb is even greater than for the standard version, even if its price is higher. This is understandable - it’s unlikely that 16 GB of disk space will really be enough for anyone, and you don’t really want to install a memory card at the expense of the SIM card slot.
Popular benchmark for assessing performance AnTuTu smartphones When testing the device, it gave a high score of 81604 points. In fact, the gadget will be able to solve any task that is popular today that the user sets for a mobile device. Games are on high settings and without lags.
Camera
The resolution of the main camera of the model is 13 megapixels. According to company representatives, an OmniVision sensor is installed, and one of the latest and most effective developments. The five-element lens and f/2.0 aperture are complemented by phase detection autofocus and a dual-tone LED flash. The front camera also turned out to be quite decent - 5 megapixels with an f/2.0 aperture.
If we conduct a global analysis of the camera after using it for a couple of weeks, we can say that it perfectly performs the task of color rendering, does not allow errors in exposure and guarantees obtaining the most detailed images regardless of the lighting level. The main advantage of the front camera is its fixed focus. To get good pictures, we recommend using it only in sufficient lighting.
The camera has enough modes for shooting: “Panorama”, “Alignment”, “Manual mode”, “Night mode”, “Timer”, “Voice”, “Scene”, “Enhancement”. In manual mode, you can only set white balance and ISO yourself, while distance and shutter speed remain fixed parameters.
Battery
The model is equipped with a 4100 mAh battery; it cannot be removed and replaced. It takes about two and a half hours to fully charge the battery. In terms of autonomy, AnTuTu gives the phone 9215 points - this is almost twice the average.
In the settings, the user can choose the energy consumption modes - balanced or productive. Can also be customized automatic shutdown power-saving mode for a particular application.
We hope that reading our Xiaomi review Redmi Note 4 was useful for you. We also recommend watching videos about gadgets on the official Arstyle Youtube channel. You can buy this gadget in any hardware store, for example, in the Allo online store. Look out for a review of Xiaomi Redmi Note 4 Pro on our website soon.
Mobile devices of the famous Chinese company Xiaomi are well known to advanced users and are deservedly popular. The next smartphone that appeared on the market, Xiaomi Redmi Note 4, aroused genuine interest in it, and in order to understand its features and advantages, it is necessary to consider the presented model in detail.
The smartphone goes on sale in a compact white cardboard box with an image on the cover of the device itself, the company logo and the model name.
Inside there is a standard set: the device itself in a protective film, documentation, a two-amp charger, a black USB micro wire and a paper clip.
Design
The main task of the manufacturer was to correct the shortcomings of the previous version of the mobile device - to make an excellent design and high-quality assembly so that users would have nothing to complain about. They succeeded; according to these parameters, the Xiaomi Redmi Note 4 phone is not inferior to Samsung and Apple products. Stylish appearance, pleasing to the eye the smartphone surprised users. The undoubted advantage of Redmi Note 4 – use of aviation aluminum as a material for the body. Looking at the new product, it is difficult to classify this device as a budget mobile device. The phone fits comfortably in your hand and looks elegant and stylish. The case does not contain plastic inserts that spoil the appearance. They were replaced by elegant stripes, expertly matched to the metal.
On the back panel, the main camera is located at the top center, below it is a bright multi-colored led flash, and just below is a fingerprint scanner, which works clearly and quickly. Here you can see the company logo.
The front panel of the Xiaomi Redmi Note 4 smartphone is decorated with a 2.5D screen. It contains backlit control buttons and an LED event indicator. Front panel color black or white. Many people prefer the first option, since the black frames around the screen are not visible, unlike the white model.
The hybrid tray, consisting of two slots, is located on the side on the left side. You can insert 2 SIM cards into it. Instead of nano-SIM cards You can insert SD micro.
On the opposite side of Xiaomi Redmi Note 4 there are 2 buttons: volume and power. They are very conveniently located, they are easy to feel blindly.
The USB connector, surrounded by grilles for the speaker, is located in the usual place - on the bottom end of the phone.
An auxiliary microphone for noise suppression, a small headset jack, and an infrared transmitter are located on the top end of the Xiaomi Redmi Note 4 device.
The design and assembly of the device is excellent. It looks decent, despite the fact that its weight is 175 grams, dimensions: 151x76x8.35 mm. The phone is available in three colors: light and dark gray, and gold. Fingerprints are not very visible on the case, due to the fact that the metal case is almost matte.
Display
Smartphone Xiaomi Redmi Note 4 ( unofficial brand name) has a 5.5-inch screen with a resolution of 1920x1080 pixels. It is created using IPS technology. We are pleased with the excellent viewing angles; a clear picture is ensured even when the device deviates strongly from the vertical and horizontal. The brightness is higher than the Redmi Pro model, which has an OLED panel, at 450 nits, but the blacks are less deep. The white color is also not pronounced and has a slightly pinkish tint, but this is the case if the sun is shining brightly. Overall the screen is pretty good and supports 10 touches simultaneously. The display is protected by an oleophobic coating, but there is no point in talking about the high resistance of the glass to scratches. If necessary, the user can set the brightness manually. The proximity sensor locks the screen when you hold the phone to your ear. By tapping on the glass you can turn the display on and off.
Performance
Manufacturers have released the Xiaomi Redmi Note 4 smartphone ( unofficial brand name) in two modifications, differing in the amount of built-in and RAM. The device runs on a Helio X20 processor with 10 cores. The Mali-T880 MP4 accelerator is equipped with 4 cores. The RAM in the phone is 2 or 3 GB, the built-in memory is 16 and 64 GB, respectively. The performance of the device is quite enough to perform daily tasks and games that are undemanding in terms of graphics at medium settings. Otherwise, there will be braking, which will not give the user pleasure. The maximum heating of the case is 44 degrees, this is especially noticeable when watching video files, during games and video shooting.
Technical characteristics of Xiaomi Redmi Note 4
Xiaomi Redmi Note 4 (unofficial brand name) runs on the Android 6.0 Marshmallow operating system with the official English-Chinese firmware MIUI 8.0. If the first devices did not have a Russian-language version, now for this model you can download the official “global” or make custom firmware. The phone is constantly updated to current version. Because the Google services are not available on the phone, they can be installed using the company’s application store.
The smartphone has several beautiful screensavers for the lock screen, which the user can set independently; they will change according to automatic mode. Using the icon located in the lower left corner of the screen, you can easily launch the application for the IR transmitter. You can also immediately turn on the camera directly from the device screen. Using the search bar that appears in the settings menu, you can quickly find the item you need without scrolling.
Camera
Xiaomi Redmi Note 4 ( unofficial brand name) is equipped with a main and front camera of 13 and 5 megapixels, respectively. The quality of the images is quite decent, if you shoot in the daytime, the colors are close to natural shades. With HDR mode turned on, even in dim lighting, the pictures are of good quality. The software part of the front camera has settings that will help improve the quality of selfies.
Battery and charging for Xiaomi Redmi Note 4
IN Xiaomi smartphone Redmi Note 4 accumulator battery non-removable. Its capacity is 4100mAh. Experts assess the autonomy of the mobile device as average. With active use, the phone will last only 5 hours without charging, as shown by testing results. It will take 2.5 hours to fully restore the battery.
Xiaomi Redmi Note 4 prices
Results
Based on the results of the Xiaomi Redmi Note 4 review, it is clear that fans of the Chinese company's products should like the phone. The Xiaomi Redmi Note 4 device has quite decent characteristics for performing basic daily tasks. Among the advantages, the following advantages can be noted.
pros
- stylish design;
- excellent build quality;
- good sound;
- support for two SIM cards, Wi-Fi, Bluetooth, built-in GPS, GLONASS system, etc.;
- good user-friendly screen and interface.
Minuses
- low autonomy;
- need for firmware;
- small amount of memory in one version of the device.
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