Why doesn't Lenovo see the SIM card? What to do if your Android smartphone does not see the SIM card. reasons why the phone does not see the SIM card

For some time now, tablets began to be equipped with special 3G modems and GSM modules, which allowed the manufacturer to launch devices of this type on new level demand. However, along with new communication capabilities, the above-mentioned tablet devices inherited from their smaller brothers (meaning ordinary cellular devices) a certain predetermination to various kinds of network failures. However, in most cases, the seemingly problematic situation “the tablet does not see the SIM card” has a fairly simple solution. This article will help you understand the reasons that led to the “technical blindness” of the device and understand how you can independently eliminate the identified malfunction. So let's turn on the positive and move on!

Form factor features of starter packs

You will be surprised, but in most cases the reason that the tablet does not see the SIM card is precisely the incorrect positioning of the SIM card itself. If the subscriber GSM chip does not fit into the special slot of the device or unnaturally falls into the depths electronic device, perhaps the SIM card does not meet the required standard.

Today, the most common use of SIM cards is the traditional type (MINI SIM). The slightly reduced size of GSM cards belongs to the MICRO SIM type. The NANO SIM standard closes the list. By the way, these are exactly the SIM cards that Apple devices are equipped with.

So, if after installing the starter package you suddenly find that the tablet does not see the SIM card, make sure that the installed SIM meets the technical requirements of the tablet device manufacturer. You may need to purchase a special adapter or carefully trim off the extra millimeters of the plastic frame of the GSM chip. In the context of the above, it becomes clear: the size of the SIM card matters.

“Naughty hands” and the consequences of their owner’s thoughtless haste

There are often cases when an unlucky user tries at all costs to shove or squeeze a SIM card that clearly does not want to go in (for known reasons) into the corresponding housing hole. As you understand, after such an “execution” the device is unlikely to work fully in the future. Usually, excessively applied force and the reluctance of some users to understand the current situation in more detail (the tablet does not see the SIM card) lead to a disastrous result: the internal connectors of the SIM receiver break. In the latter case, the “hurry” cannot avoid specialized repairs. Well, if you take into account the fact that the model is a brand name, then this kind of repair will cost a lot of money.

Chinese "troubles", or Where is my operator?

Sometimes the user does not even know that he has become the owner not of the original device, but of a clone from the Middle Kingdom. It is worth mentioning that in Lately The stereotype “Chinese means...” has become somewhat outdated. However, the relevance of the consequences still applies to devices whose cost more than corresponds to the concept of “cheap”.

So, it may happen that when you insert a SIM card, your device will not be able to determine the operator, that is automatic settings won't work. It’s quite natural that the question will definitely arise in your head: “Why doesn’t the tablet see the SIM card?” The answer to such difficulties could not be simpler: search for active GSM networks manually, and after you specify the desired communication provider, the problem will be resolved.

Software failures and methods for eliminating them

A rather difficult situation is when, for example, a Lenovo tablet does not see a SIM card that is known to be working. What to do in this case?

Contact the store with a reasoned complaint about a malfunction of the device.
Check the firmware version yourself for compatibility with your device.
Uninstall third-party software.
Perform a hard reset of the device, first saving the necessary data to the memory card.

In case of absence positive results Contact a specialist workshop for assistance. Calm down, the flashing process is a fairly quick and relatively inexpensive procedure for this type of electronics such as a tablet.

Finally

So, we can say the main points of the question: “The tablet does not see the SIM card, what should I do?” You and I have allowed it. However, we should not forget that the cause of unnecessary worry may be the user’s banal inattention. Agree, turning to a specialist for help will make a person look a little stupid after the problem with the SIM card is resolved by simply deactivating the autonomous or “flight” mode. By the way, the user-assigned priority Wi-Fi networks can also become a kind of culprit for the inactivity of the GSM chip. And lastly: don’t discount the negative impact environment. After all, sometimes the question voiced in the article “why the tablet doesn’t see the SIM card” can have a funny and, nevertheless, truthful answer: “Write less SMS in the rain!”

That's all. All the best to you and... protect your gadget from bad weather!

Lenovo tablet does not see the SIM card, what should I do?

Finding that your Lenovo tablet does not see the SIM card, does not detect it, you can deal with the most obvious reasons and try to fix the problem yourself. Before contacting service center, read our article and make sure that you simply do not have the offline mode “on the plane”.

Is the SIM card itself working?

You must first check the serviceability of the SIM card itself. Test its performance on another device. It is also advisable to clean the contacts. Since during long-term use it could become dirty. Use a paper eraser to do this, running it over the contacts of the SIM card.

Make sure you are using the slot provided by the manufacturer. Do not forget that the card must be installed with the operator logo facing up and the chip facing down.

If the card is not detected on another gadget, then simply replace it at your operator’s salon. The procedure takes 5-10 minutes, the remaining funds are transferred in the same amount to a new one. The service itself is free for subscribers.

Right size

You cannot ignore modern standards declared by the manufacturer for specific model your Lenovo tablet. The SIM card should not be larger or smaller than the SIM slot. If you cut it yourself or didn’t do it carefully, there is a high probability that you damaged the contacts of the chip and it is now not working properly.

Replace your SIM card with your operator and contact a specialist to cut it. Modern cards already have the ability to choose the size you need. The chip on the card itself has a minimum size just to be used as standard size, and nano-format for ultra-thin gadgets.

SIM reader slot serviceability

Using a SIM card format that is not suitable for the slot size leads to disastrous results. With repeated attempts to fit a larger or smaller card, there is a high probability of damaging the connector itself.

You can withdraw back cover and unscrew several bolts located around the perimeter rear housing, disconnect it and see damage or missing contacts on the SIM readers. Then you need to replace them with new ones by contacting a workshop to restore your Lenovo tablet.

Software glitch

If the Lenovo tablet does not see the SIM card of MTS, Beeline, Tele2, Megafon, the problem may be of a software nature. Remember, perhaps the day before, you installed some application? Incorrect work some applications or availability malware may well cause such damage to your device. Remove installed latest apps and perform anti-virus cleaning.

More simple solution It may be a factory reset. Just before doing this, save all important data, since during the hard procedure reset tablet will return to the state when you first purchased it.

More radical, but no less effective way is a flashing Android systems. This eliminates a huge part of the problems in the operation of gadgets on this platform. Just take care to use official versions from licensed suppliers.

Originality of the device

A factor such as the originality of your gadget when asked if a Lenovo tablet does not see a SIM card becomes relevant when you are the owner of a so-called copy. When you try to install your operator's card, the automatic settings simply do not work. By default, they are set to operators in the country of origin (for example, China). You need to manually select the GSM networks available in your region in the corresponding section of the settings menu.

This article is primarily for those people whose SIM card is no longer detected just like that. No mechanical damage. For example, you reset your smartphone to factory settings, installed an update or reflash it, and after these manipulations your SIM card is no longer detected, this article is for you.

Let's immediately omit methods that you may have already read on other sites, like - remove the SIM card, try to restart your smartphone, and so on. None of this will help you. By the way, let me guess - you have a smartphone with MediaTek processor. Exactly inexpensive smartphones on this processor are primarily susceptible to this problem.

Smartphones Lenovo And ZTE can be called record holders for problems with IMEI. This is especially true for Lenovo. By phrase Lenovo smartphone does not see SIM card The Internet is simply teeming. Have you updated the firmware? Reset your settings? Didn't you do anything? In most cases, Lenovo's IMEI fails.

What is the problem. Why doesn't my smartphone see the SIM card?

There is only one reason - the NVRam was damaged when next firmware and the IMEI disappeared along with it. In short, NVRam is a small flash drive on which various service information about the smartphone is stored, and IMEI unique your device identification number. This IMEI is exactly what is stored in NVRam. Without it, no SIM card will work.

How to determine that the problem is really in NVRam and IMEI?

Dial the command on your phone *#06# and if you see empty IMEI and IMEI2 lines, then your IMEI has failed. In a working smartphone everything looks like this:

I think it’s clear that if you have one SIM card, then there will be one IMEI or not if it’s gone.

By the way, this command works not only on smartphones with a MediaTek processor, but also on most other devices. In particular, I tested on smartphones with Qualcomm processor and HiSilicon.

Below I have written several ways in which you can restore IMEI, after which your connection will work again and your smartphone will see the SIM card.

Solution to the problem.

On some phones, some methods may work, others may not. Pay attention to this. For example, there is no CDS Information section on new Meizu smartphones.

Method 1.

This the method will work not everyone. if you have Root rights, see method number 2 below.

1) Go to engineering menu by typing the command: *#*#3646633#*#*. Attention! The command only works for MediaTek processors!

2) Go to the Connectivity tab

3) Go to the CDC Information - Radio Information section

4) Select Phone 1 or Phone 2, depending on how many SIM cards you have. After all, each SIM must have its own IMEI.

5) In the AT+ line you must send a special line, the so-called AT command.

Command for the first SIM card:

AT+ EGMR=1.7,"Here is your IMEI"

Command for the second SIM card:

AT+ EGMR=1.10,"Here is your IMEI"

Did you enter the command? Now click on the SEND AT COMMAND button. After which you should restart your smartphone and check the IMEI again. If everything was done correctly, you should have a network.

Remember! You must enter the real IMEI address of your phone, which is written on the box or on the back cover of the smartphone.

I draw your attention to the fact that this method works for some people until the smartphone is rebooted. That is, after a reboot everything is reset. If you do too, read on.

Some people may have the CDC Information menu but no AT commands are sent. In this case, you will see the following message: at command is failed to send. If you have this message, it means that you are blocked from working with AT commands and the first method is definitely not suitable for you.

Method 2.

There is another interesting way to make a SIM card work in an Android smartphone - through the Chamelephon application

This application requires Root rights. If you have already flashed your smartphone, then I think you have these rights :) And if you don’t have them, then in 90% of cases you can get them using KingoRoot. If you were unable to install Root, write your smartphone model in the comments. By the way, this method is suitable for all phones with Root.

So, the application screenshot looks like this:

And its point is to simply enter the IMEI and save it. All this is done much easier than in the first method, but at the same time this method works directly with NVRAM, and in order to write something to /data/nvram you will need Root access. You can write down either a random IMEI address or your real IMEI address.

If method 1 did not work for you, then this method should definitely work for you. After all, the application does not work with AT commands, but writes to the file /data/nvram/md/NVRAM/NVD_IMEI/MP0B_001, where your IMEI is located.

If method 2 also does not work for you, make sure that you really have Root on your smartphone.

Bottom line.

I hope one of the methods definitely helped you. I am 100% sure that if the first method, which does not work on all devices, does not help you, the second method will help you. If nothing works out for you, write in the comments the model of your smartphone and what you did before the IMEI was lost and what you did to restore it. I'll try to help you.

Lenovo P780, A706, A390, A820, S6000 does not see the SIM card?

In practice, it happens that Lenovo P780, A706, A390, A820, S6000 does not see the network. Sometimes you can fix this problem yourself. To eliminate such a defect, there are several techniques that you can use to restore the functionality of your mobile device.

If the SIM card is not readable, first of all you need to check the SIM card itself. The reason may lie in the oxidation of its contacts, in a poor fit to the SIM reader. Try to see if the SIM card works in another device to rule out a tablet malfunction. If, after installing it in another phone, you find that the phone with the card works, then the problem is not in the SIM card and another method of elimination is required, possibly repair at a service center. If another phone does not work with your SIM card, we can conclude that the SIM card itself is faulty. Try to carefully clean the contacts without damaging them and degrease them with a cotton swab and alcohol. SIM card board tracks can also be damaged by corrosion. This is completely removable.

If these steps do not help, try checking the tightness of the SIM card to the holder. Seal this area with a small piece of tape. Sometimes this is quite enough to eliminate the defect.

You can take action to replace the SIM reader. This can be done at the service center.

After all the steps, the SIM card does not work? You can buy a new one if you are sure that the SIM card is faulty. Your data can be transferred to a new SIM card. Contact your company operator cellular communication, this is a matter of his competence.

Sometimes the tablet accidentally gets into liquid. There are many such cases. Without wasting time, open the removable Lenovo cover and dry all components until complete removal moisture. First remove the battery and SIM card.

One way to restore the operating mode is hard reset settings (Hard reset). This action returns you to factory settings. Sometimes very effective or reflashing the device.

If your independent actions did not eliminate the defect, then get to know us in more detail with recovery conditions link - " ". Here you will see many tips for eliminating such breakdowns and methods for restoring your tablet. The article is useful for a general acquaintance with the issue and detailed study possible methods recovery.

Lenovo tablet does not see the SIM card, what should I do?

Having discovered that your Lenovo tablet does not see the SIM card and does not recognize it, you can deal with the most obvious reasons and try to fix the problem yourself. Before contacting the service center, read our article and make sure that you simply do not have the autonomous mode “on the plane”.

Is the SIM card itself working?

Make sure you are using the slot provided by the manufacturer. Do not forget that the card must be installed with the operator logo facing up and the chip facing down.

Right size

You cannot ignore the modern standards declared by the manufacturer for the specific model of your Lenovo tablet. The SIM card should not be larger or smaller than the SIM slot. If you cut it yourself or didn’t do it carefully, there is a high probability that you damaged the contacts of the chip and it is now not working properly.

Replace your SIM card with your operator and contact a specialist to cut it. Modern cards already have the ability to choose the size you need. The chip on the card itself has a minimum size just to be able to use both standard size and nano-format for ultra-thin gadgets.

SIM reader slot serviceability

You can remove the back cover and unscrew a few bolts located around the perimeter of the rear case, disconnect it and see damage or missing contacts on the SIM readers. Then you need to replace them with new ones by contacting a workshop to restore your Lenovo tablet.

Software glitch

If the Lenovo tablet does not see the SIM card of MTS, Beeline, Tele2, Megafon, the problem may be of a software nature. Remember, perhaps the day before, you installed some application? Incorrect operation of some applications or the presence of malware may well cause such damage to your device. Remove the most recently installed applications and perform an anti-virus cleaning.

Another simple solution may be to reset the settings to factory settings. Just before doing this, save all important data, since during the hard reset procedure the tablet will return to the state when you first purchased it.

A more radical, but no less effective way is to flash the Android system. This eliminates a huge part of the problems in the operation of gadgets on this platform. Just be sure to use official versions from licensed providers.