The second SIM card does not work. What to do if the SIM card does not work, the phone does not see the SIM card? The contacts of the SIM card and the smartphone do not fit tightly enough to each other

The slot and the SIM card itself are one of the most vulnerable parts of a smartphone. Therefore, there are many reasons why a mobile device does not read a SIM card. Some of them are easy to fix, others can only be fixed by a professional. We propose to analyze the most popular options for why the phone does not see the SIM card. You will also find simple and proven tips on what to do if your mobile device loses the network or does not connect to it at all.

In the article:

System failures

Many factors undermine job stability operating system. Often they do not greatly affect functionality, but periodically provoke failures, for example, when working with a SIM card. Usually, to fix errors of this kind, it is enough to follow simple steps:

• Reboot your device. If you inserted a SIM card into a running device, it may not detect it until you restart. Hold down the power key, select "Restart" and wait for the device to turn on again.
• Remove the battery and SIM card. Turn off the device, remove the battery (if possible) and SIM card for 30 seconds or more. Upon completion of this procedure, place the components in place and turn on the mobile.
• Switch "Airplane Mode". This mode disables all data transmission via mobile communications. Some phones have access to the mode activation icon via quick settings in the notification curtain. If you have it, then activate Airplane Mode, wait 20-40 seconds and turn it off.

If there is no icon in the curtain, follow the path “Settings - Network and Internet - Advanced”. There is a flight mode control button there.

Expired SIM card

If the card has not been used for a long time and the device does not see it, it means that the validity period of the number may have expired. Because of this, she becomes inoperative. Go or call the operator to find out if the card has expired.

The SIM card is locked to a specific operator

This problem is faced by people who bought a smartphone in Europe and the USA. You could get a device designed for an American telecom operator. Unlocking the gadget is possible, but it is not cheap, and the success rate is not 100%. Because of this, the iPhone often does not see the SIM card.

You can unlock your Apple phone by officially contacting the company or using R-sim, which has a more affordable price. Then you can insert cards from Tele2 or other operators.

Dirt in the slot or on the SIM card chip

Both elements can become dirty over time. If dust has formed between the contacts or a foreign object has entered, this will cause delays in recognizing the SIM card or it will turn off all the time. Always handle these parts with great care and wipe them down whenever possible.

If the gadget does not connect to the network, try the following:

• remove the card holder;
• visually inspect them for dirt and damage;
• shine a flashlight into the socket, make sure there is nothing unnecessary there, blow it out;
• Wipe the tray and SIM card so that the golden chip is perfectly clean;
• insert the card back into the device and start it.

Often this simple operation helps to revive old SIM cards of Beeline and other operators, after which the gadget can see them again.

Broken SIM card or tray

As already noted, these are fragile and small parts that can be accidentally damaged. For example, getting them into water, falling, careless removal or rough installation into the socket may well lead to microcracks or breakage of contacts. If this happens to the card, it can be replaced at the branch cellular communications.

If the tray or connector where it is inserted has become unusable, then you won’t be able to do anything on your own; you will have to contact a repair center, where they will tell you why the phone does not see the SIM card.

But before you do this, inspect the details:

1. Follow the first four steps from the previous instructions.
2. Install the card in another smartphone and check if the connection works on it.
3. Insert the card into the slot and make sure it fits snugly.
4. If the SIM card falls out, carefully place a piece of paper or simply replace it with a new one.
5. All that remains is to insert the card and start the device.

Attention! If you cut the card yourself to make it smaller new standard, they could damage it. In this case, it is better to contact the salon to get a new SIM card. In the future, don’t try to cut it yourself, so that you don’t have to wonder why the phone doesn’t see the SIM card.

Communication parameters are lost

Sometimes on Android these settings change spontaneously or disappear after updating the firmware. This often leads to a loss of connection. To resolve the issue, do the following:

1. Follow the path “Settings – System” – Advanced – Reset settings.”
2. Click on "Reset" Wi-Fi settings, mobile Internet and Bluetooth."
3. Confirm the operation.

The system was attacked by a virus

Virus applications can affect many aspects of Android, including network reception. To avoid them getting into the OS, do not open suspicious links, letters, banners, and also do not install dubious software.

We need to find out whether the phone is not reading the SIM card due to malware. First, switch the gadget to safe mode, deactivating third-party software. To do this, do the following:

1. Press and hold the Power key.
2. Press "Power Off" for a few seconds.
3. The smartphone will offer to switch to safe mode, agree.

Check to see if the card is recognized. If yes, then it’s time to look for the hacking software that caused your phone to stop seeing the SIM card.

To do this, do the following:

1. Go to Apps & Notifications.
2. “Tap” on “Show all applications”.
3. At the top, select Installed Applications.
4. Look through the list of programs, look for suspicious software with strange names or software that you definitely did not install.
5. Remove the virus and restart the smartphone, the MTS, Tele2, etc. network should appear.

As an alternative, you can install Kaspersky Anti-Virus and scan the system. You can download it from the Play Store.

Global failures in the operating system

The operating system may stop working correctly due to a reason such as a failed update software or installation unofficial firmware, which has communication bugs. If you use a custom build, go back to stock.

Check for available updates. If a communication bug is widespread, the vendor will quickly release an update. If the failure occurred as a result of errors during the update and the new build did not fix it, do a factory reset. Then the device will probably recognize the SIM card.

1. In the device settings, open “System – Advanced” – Reset settings – Delete all data.
2. Reread the warning again and start the process.
3. When downloading, you need to reconnect your account and restore your data.

Attention! Hard Reset will erase all data from the device (apps, photos, videos, accounts, etc.), so do backup copy data.

If your mobile phone falls into water, falls and is damaged, or the connection stops working after other damage and the manual did not help, contact a repair center so that a professional can diagnose the device, find out why it does not recognize SIM cards and repair the contacts or tray if necessary.

First of all, a telephone is a means of communication, and only then a multimedia player, a tool for surfing the Internet, a camera, etc. And if the smartphone does not accept SIM cards, its main function will not be available. Problems with SIM card Samsung Galaxy may arise for various reasons. Some of them can be eliminated on your own, while others require more professional intervention. Let's look at why Samsung doesn't see the SIM card, and what to do in a particular case.

Main causes of SIM card problems on Samsung phones

There are a lot of factors leading to the fact that the device does not see or cannot recognize the SIM card. However, all of them can be combined into three groups:

1. Mechanical problems mobile device. They occur when a card is frequently removed/inserted into the SIM slot, the device is damaged as a result of a strong impact, or moisture penetrates under the case.
2. Problems related directly to the SIM card. May be due to the presence of printed circuit board scratches, chips and other mechanical defects, expiration of the SIM card or its blocking by the operator.
3. Malfunctions of the operating system or installed software. Samsung may not see the SIM card after it is disabled by software, due to the installation of unofficial firmware or by deleting the IMEI number.

Let's consider each of the possible options in more detail.

Mechanical damage to a mobile device and how to fix it

If problems arise with the operation of the SIM card, the first thing you need to remember is whether the phone has been subjected to any external influences. So, if you dropped it, there is a possibility that the power amplifier, microcontroller, connector or other module may fail or become unsoldered. In such cases, it is better to contact a service center.

If there are no prerequisites for the Samsung to break down, try the following:

Troubleshooting SIM card problems

If you determine that the source of all the troubles is the SIM card itself, it is recommended to act in the following order:

Software malfunctions

If you are the owner of a dual-SIM Samsung and the SIM card is not visible in only one of the connectors, see if the second slot is enabled in the device settings. Required function located in the "SIM Card Management" section.

There are cases when, after a smartphone is infected with a virus or its independent firmware NVRAM – non-volatile random access memory – is damaged on it. This is where the IMEI of the mobile device is stored. If you erase it, Samsung will not detect SIM cards.

To fix the problem, you will need to restore the IMEI. This can be done through the engineering menu:

After restart phone IMEI will be restored and everything should work. If this does not help get rid of the problem, all you have to do is reset all settings to factory settings or reflash your smartphone via PC and Samsung program Kies.

Today's phones are equipped with various additional features, however most main function it still remains to ensure stable communication. Without the function of receiving calls and SMS, any, even the most sophisticated Android, turns into a poorly functional toy. However, smartphone users may periodically experience situations when the device does not see SIM card, and the phone says “no signal”. Let's get acquainted with the causes of the problem and methods for eliminating it.

Reasons why Android does not see SIM

• The card has expired - Most likely you had a temporary SIM card that is active for certain time. These are usually sold in kiosks or subways and are in demand among tourists. How to fix the situation? Contact your mobile operator and order a new SIM card with the same number;
• long-term non-replenishment of the number - some tariffs provide for blocking the number if funds are not received for a certain time. To fix the problem, call the operator, you can use another phone, when contacting an employee, indicate your number;
• card size correction - many modern smartphones use nano and micro connectors, which standard cards do not fit. Sometimes this procedure can damage important contacts and render the SIM card inoperative. This situation is possible if the user performs the circumcision procedure personally or turns to non-professional employees;
• the phone is locked - similar cases arise when buying a smartphone abroad, where a common practice is to sign a contract with a specific operator. Accordingly, after Android is taken out of the country, it becomes non-functional. What to do? The only option is unlocking;
• Damage to the SIM card slot - the problem occurs after Android crashes. It is almost impossible to resolve the issue on your own. It is recommended to contact a service center;
• glitches in the operation of the software - a malfunction can occur after an unsuccessful root or after firmware that has become crooked. To resolve the issue, you should return to the factory settings or try to flash the model again from another specialist.

Why else might Android not see the SIM card?

A popular reason for a SIM card not to work correctly may be its contamination. Dust and small particles can collect even in the most difficult to reach places, including the SIM slot. In this case, the smartphone malfunctions and writes “check the readiness of the card”, without identifying it. To fix the problem, you need to remove the card and wipe it with a rag or eraser.

A broken card holder can also lead to communication problems. Breakdowns usually occur after physical damage; a malfunction can manifest itself after water gets inside the phone. The slot and the SIM card itself do not fit tightly together, so the connection may be lost or interrupted at times.

In some cases, problems with a SIM card are caused by the actions of the users themselves. Often they forget to turn off the set “airplane mode”. Android continues to function fully, but receiving and making calls remains unavailable.

The problem may occur after a factory reset. In this case, the SIM card may simply be inactive. To resolve the issue, you need to go to the main menu of your smartphone and check the box in the SIM card menu for activation. If manual actions are not effective, then you need to try sending any SMS from the card that does not support communication. After this, the system will automatically request permission to activate it.

Communication may be lost when glitches occur in the phone's IMEI code. Each Android is assigned its own unique code, without which maintaining communication is simply impossible.

How to set up a SIM card - algorithm of actions

Often, communication problems arise after turning on Android. Many models start to work quite slowly over time. Therefore, it takes time for them to restore full functionality of all options. If immediately after turning on the smartphone the connection is unavailable, we recommend that you just wait a little.

Often the phone does not see the SIM card if it has moved a little in the holder. To eliminate the problem you only need to remove back cover and check the position of the SIM card. In some cases, a simple sheet of paper can be a panacea. Select the correct shape and size of paper, placing it between the SIM card and the battery. This will strengthen the signal and resolve the problem.

Often, a lack of communication occurs when a smartphone model overheats. Such malfunctions are seasonal and typical for the warm season. To fix the problem, it only takes time for the Android to cool down and restore the optimal functioning of all systems, including cellular communications. Similar problems can arise in winter due to sudden temperature changes. The way out of the situation is to buy thicker covers.

The situation when the phone does not see the SIM card can arise for any subscriber Russian operator- MTS, Beeline, MegaFon, Tele2, or Yota. This can happen for a number of reasons, not always dependent on the person using the device. Today we will tell you why the phone may not see the SIM card, and what needs to be done to solve the problem.

Finding out the reason

The main thing to do if the phone does not see the SIM card is to find out the reason. The cause of the problem may be either the device itself, which uses the SIM card, or the card itself.

You need to determine why this is happening - the phone does not see the SIM card at all, or the operator’s network is just unavailable. It's quite easy to find out. If you installed a SIM card in your phone, and the device writes that the SIM card is not installed, this means that the phone does not see the SIM card. If the phone does not display a notification about the absence of a card, but does not see the operator’s network, then this may be due to both the SIM card itself and the device.

There are many reasons why the phone does not see the SIM card, and this problem occurs both on push-button telephone, as well as smartphones on Android and iOS. If cellular telephone does not see the SIM card or the network, then analyze why this problem appeared - after a fall, or a software update, or maybe this situation occurs periodically.

You shouldn’t rush to take a phone that doesn’t see the SIM card for repair, since the problem may lie in the SIM card itself, and you can also solve it yourself. The first thing to do in such a situation is to turn off the device and remove the SIM card. After that, insert the SIM card into the phone and turn it on. If the problem persists, then you need to check the device with a different SIM card, as well as the SIM card in another phone. These simple steps will help you determine why the device does not see the SIM.

If no phone sees the SIM card, then the problem is most likely in the card itself. If the SIM card works normally in another device, then the reason can only be a gadget.

Solution

If the problem is with the SIM card itself, then the only solution is to replace it. There are many reasons why a SIM card can fail: it can be damaged or blocked by the operator.

All mobile operators They replace SIM cards for free, and the procedure itself will not take much time. To do this, just go to the nearest company salon with your passport and apply for a new SIM card. Within a few minutes the subscriber will have a new card in his hands.

After replacing the SIM card, you will have access to both the previous number and the tariff and services connected to it. The account balance will also be maintained. Paid replacement is made only if the SIM card is sent by mail, which will require some time from the subscriber, since delivery is carried out by regular mail.

Even if the problem lies in the device itself, then you should not rush to the service center, since in most cases the problem can be solved yourself.

Most often, subscribers encounter this problem after updating the software or installing new software. If the problem occurs in this case, then you need to reset the device to factory settings. How to perform this procedure can be found in the user manual, or by contacting hotline manufacturer.

Situations also arise when a person bought new phone, which does not see the SIM card. This mainly concerns gadgets that were not officially imported to Russia and are “locked” either under a specific operator or European providers. If the phone is intended for use in European Union networks, then the situation can be resolved simply by inserting a SIM card from any European operator into the phone. You can remove the blocking for a specific provider (most often this applies to American ones) remotely, using the services of “craftsmen” on the Internet.

If none of these options are suitable - you are not ready to look for a technician on your own online, or buy a European SIM card, then you will have to contact a service center. Please also keep in mind that official services often do not perform such unlocking, so you need to use the services of unofficial salons.

If the device is not “locked” to a foreign operator, or previously worked normally, but now does not see the card, then you need to contact a service center to have it repaired. We recommend that the device be diagnosed and repaired only by an authorized representative. This will not only allow you to be confident in high-quality repairs of the device, but will also help to avoid additional costs. This is due to the fact that third party services can be added to the bill Additional services for repairs that were not carried out on the gadget. Also, if the device has a warranty, then its repair will not cost a penny if the cause of the malfunction was not your fault.

conclusions

If the device stops seeing the SIM card, then the first thing you need to do is determine the reason. You can check the functionality of the card itself in any other device, and if necessary, replace it free of charge at the operator’s salon.

If the reason lies in the gadget itself (the SIM works in another phone), then determine why it stopped working normally. If this happened after a software update or flashing, then resetting to factory settings or re-flashing will help.

In case of another problem, you must take the device for diagnostics and repair to the manufacturer’s service center. Don't forget to take your warranty card with you, which can save you money.

If your smartphone does not read the SIM card, you should immediately find out why the phone does not see the SIM card. After all, if the card is not active, then the mobile device becomes practically useless, because it is simply no longer capable of performing its main function. The causes and ways to eliminate such problems are worth considering in more detail.

Why doesn't the SIM card work?

Many users have encountered a similar problem: the SIM card stopped working or was immediately inactive after being installed in a communication device. There may be two options: either the phone does not initially recognize the SIM card, or at some point it simply stopped seeing it for a reason unknown to the user.

No one is immune from such problems, so it’s worth considering everything right away possible reasons occurrence of this situation.

Possible causes of the problem

Typically, such situations arise for the following reasons:

• The SIM card does not adhere to the contact. It often happens that the size of the SIM card does not correspond to the capacity of the slot (for example, if an employee of the relevant center cut the card incorrectly), or the latter simply becomes loose due to mechanical damage. In such cases, the mobile device writes that the SIM card was not detected.

Mobile device slot capacity

• Low speed device boot. If on this moment The phone has a huge number of different programs and applications installed that are activated when the smartphone is turned on, and it detects the SIM card more slowly. In this case, the SIM card will definitely be accepted sooner or later, the user will just have to wait a few minutes.

• Dirt on contacts. During operation, the communication device periodically becomes dirty. The user can clean the outer part of it from dust and other things, but a certain part of the dirt remains inside the phone. There are also situations when it accumulates on the contacts, which prevents the smartphone from connecting a SIM card.

• Damage on the map. It also happens that the SIM card turns out to be damaged. The fault may be scratches, splits, manufacturing defects, etc. But one way or another, if the problem is in the SIM card, then it will need to be replaced. Some mobile operators can duplicate your SIM card for free in this case, without losing the number and information on it.

• Damage to contacts. This happens when the user frequently moves the card. The culprit will be mechanical damage, which cannot be avoided due to careless operation of the device. In this situation, only urgent repairs will solve the problem.

How to solve a problem?

In most cases, the problem is completely solvable, without the intervention of repairmen or a mobile operator. And if this is your situation, then one of the the following options actions:

• Reboot your mobile. When you turn it on, wait until the device boots up completely. Sometimes this needs to be repeated several times. If the card is still not detected, then you should turn off the phone. Remove the SIM card from it and reinsert it. After that, reboot.

• Wipe all contacts on the phone (we are especially interested in the SIM card slot) and the card with a soft rag or rubber cloth. Just be careful not to damage anything. This will eliminate all contamination, and if the card was rejected by the device precisely because of them, then this will solve the problem.

• Take a small piece of paper, and insert it into the card slot, along with the SIM card. It is important that at the same time the SIM card fits tightly to the contacts.

If the problem is with the phone itself

The problem may be with your smartphone, and not with the SIM card. It's quite easy to check - just insert the card into another device.

If it works successfully, then it’s worth solving the problem with the phone.

AND it could arise for one of the reasons listed below:

Video on the topic:

Troubleshooting after flashing

After unsuccessful firmware Many problems may arise, including problems reading the SIM card.

However, this is easy to fix thanks to the following steps:

1. Restore the modification according to the standard model.
2. Return serial number (IMEI).
3. Restore the original configuration.
4. Take the device for repair.

It will be useful to view:

Incorrect firmware can be easily corrected by a specialist service center, however, trying to solve the problem yourself is not recommended. After all, in this case, you risk repeating history or even irreversibly damaging your phone.

And an experienced technician will be able to set up a smartphone without any questions in less than an hour, while also providing you with a guarantee of stable operation of the mobile device in the future.

If there is a problem with the SIM card

So the alternative option is problems with the SIM card. In order to check this, you need to insert a second SIM card into the phone, and insert the supposedly faulty one into another device.

If the other SIM card is read by the phone without any problems, but the previous one cannot be seen even by another communication device, then the problem has definitely arisen in the card.

A the reason may be as follows:

• The SIM card has expired. Standard card capable of working for no more than 180 days if no one uses it. After this period, it is automatically blocked and it will be impossible to use this SIM card in the future.
• Card not activated. Some mobile operators offer to get their SIM cards for free. However, when it is inserted into the device, the user may be faced with an unpleasant surprise - the card simply does not work. But the fact is that the SIM card needs to be activated. How exactly this can be done needs to be clarified with your operator.
• Mechanical damage. Incorrect cutting, scratches, broken contacts, severe abrasions, splits, etc. - all this is considered mechanical damage, after which the SIM card will not work or will malfunction.

At the same time, they understand that the subscriber would not want to lose his number, the options installed on it, saved contacts and funds that remain on his balance.

Therefore, certain cellular companies offer users the opportunity to make a duplicate, with the same information, which was contained on the previous card:

• Megaphone. Call 0500 (support service) and tell us why your card stopped functioning. After this, the operator will clearly tell you what actions to take to solve this problem in the future.
• MTS. Dial 8-800-250-0890 and follow the voice menu instructions. It describes in detail exactly how you can restore the card to working order.
• Beeline. Call 0611. Tell us about the situation, after which the operator will fill out an application to restore the SIM card.