Why the phone does not see the SIM card - reasons. What to do if the phone does not see the SIM card - software solutions

The phone does not see the SIM card, and you cannot get in touch? The first group of reasons is a problem in the SIM itself, the second is problems in the device. We will describe in detail all the situations and what to do, in each case, if the SIM card does not work.

SIM card problem

Let's start with the first group of reasons when the SIM card is the culprit. What causes each situation is described below. Find out what works for you and find out how to fix the problem.

The card has expired

There is no regulated expiration date for Sim, just like the service life. For correct operation a period of seven years is considered the norm. The duration of the service life depends on the user himself: how often the SIM card is moved from device to device - the mashing process is in progress, it got into water or other liquids - the oxidation process begins, on what type of device it was before and is now - different level gadget power.
If the sim serves long time and stopped working - replace it with the operator. Contact the official point of sale with a passport.
Remember that the service will be provided only to the owner of the number, or a representative with a power of attorney confirmed by a notary.

Map is damaged

A common reason when a SIM card does not work is mechanical damage. Even if the contacts are saved, but the plastic carrier is broken, the edge is broken off, the shape of the card is broken, the gadget may not recognize the SIM card due to an incorrect location in the device slot.
The solution to the problem is to replace the Sim and get a duplicate while maintaining the number and balance. The Tele2 operator will replace the card when the owner personally contacts the subscriber service point. The procedure requires verification of identity, grab your passport. To get a duplicate, you need to pay 50 rubles, the entire amount will be credited to your account after activation.

Unsuccessful conversion to microSIM

In the communication room for Trimming Sim cards use a special stapler with exact size new form. The risk is minimal, but there is when old-format SIM cards with a wide contact field are used for cropping. Self-cutting with scissors also leads to damage. As a result, the device does not see Sim.
There is only one way out - getting a duplicate. You can prevent the situation if, when buying starter pack immediately select the correct format, and to change from micro / nano Sim to mini Sim buy plastic adapters.

Damaged SIM contacts

Contacts are provided on the SIM card:

• Vcc - power;
• Reset - control;
• Cloc - clock frequency;
• Vpp - for recording information;
• I / O - input / output;
• General ("earth").

Damage to any contact leads to breakage. Will have to apply for a new sim.

SIM card is slightly dirty

If there is contamination, use the cleaning methods:

• eraser - gently rub SIM contacts an ordinary rubber band for erasing;
• alcohol - wipe the SIM card from all sides with a slightly moistened disk.

It is impossible to wash in water, with the help of cleaning products, such actions will disable it. If the cleaning does not work, replace the Sim with a new one.

any problem with Sim card can be solved by replacing it with a new one. All operators provide the service free of charge, regardless of the reason.

Phone problem

Let's move on to the second group, in which the "sim does not work" problem depends on the phone. Some causes can be eliminated on their own, others will require contacting a service center.

Wrong settings

Why the phone does not see the SIM card?

1. Check to see if you have Airplane Mode or offline mode". When airplane mode is on, services will automatically turn off. mobile communications.
   • click the settings icon;
   • select additional settings;
   • disable the option.

   Did not help? Pull out the SIM card, wait about half a minute and insert it again. Restart your phone/tablet.

2. Check if the SIM card is enabled in the phone settings, relevant for devices with two or more SIM cards on Android:
   • go to the settings options;
   • select "Sim-card manager";
   • activate the desired SIM card by clicking on it, or switch the slider next to it to the “on” mode.

   If it doesn't help, try sending a message with an inactive Sim and the system will automatically prompt you to enable the card.

3. The phone does not see a new SIM card - activation failed. What to do:
   • install sim, turn on the device;
   • enter the pin code (indicated on the plastic blister where the Sim was fixed);
   • make a call to free number activation.
4. No online registration. Would need manual search nearest station via settings:
   • select settings;
   • click advanced settings;
   • click mobile networks.

   The device will start searching all available operators and will give you a list of possible connections. Choose what you need and activate it.

If none of the methods worked, do full reset settings: "settings" - "backup and reset" - "data reset". Back up your auto-recovery data beforehand.

The phone is tied to a specific operator

When you buy a phone in a showroom with a promotion big discount, most likely it is automatically tied to a specific operator. To find out if this is true or not, take a SIM card from another operator, insert it into the device. Didn't get a connection? Your model is tied to a specific operator.
There are two options for resolving the issue:

• contact the service center, where special equipment make changes to the software part;
• change the software by yourself.

The second option carries the risks of incorrect software changes and device failure. The most innocuous way is to manually search for another operator (described in paragraph 4 of the section above), but it does not always help.

Damaged SIM card slot

This problem occurs due to the frequent change of SIM cards, the ingress of water, sand and dust, the oxidation of iron, shaking and falling of the gadget. What to do? First, clear the slot in the device. Treat with alcohol and check that there are no dents or other defects. Any contact broken? The part is broken. It is not recommended to disassemble the device yourself, contact the service.

Faulty SIM card holder

Another reason why the smartphone does not see the SIM card is the deformation of the holder. The SIM card does not fit snugly into the slot in the phone and there is no contact. Stick a piece of tape on the SIM card or place a folded piece of paper on it. Sim will fit snugly to the contacts and the problem will be solved. The result is not achieved, or you cannot reach the holder yourself - contact the service center.

Violation of the soldering of the contacts of the cardholder

During the operation of the smartphone, dirt, water gets inside, mechanical damage is possible, as a result, the contacts of the card holder depart. If you encounter this problem, do not repair yourself. Take the device to a service center.
Job disruption operating system or software
The phone may not see the Sim due to an operating system update. For example, when setting 10 Windows versions phone system does not have time to go through initialization and gives out the Sim absence code ahead of time. Solutions:

• "roll back" the software to the previous version;
• return to factory settings.

For correct operation, install licensed software. Guaranteed problem can be solved in the service center.

The phone does not see the second SIM card

When the SIM card does not work in the second slot, first check the SIM itself for operability. Move it to another working device, if everything works, then the problem is in the phone. What could be:

• incorrect change of firmware, software - reinstall the operating system from the official website of the manufacturer or do a factory reset;
• incorrect settings - enable Sim in the device manager, or send SMS from an inactive SIM card;
• IMEI error - check if the number on the case and in the device program matches with the #06# command.

Not every phone can work with two cards at the same time, only top models. IN budget devices SIM cards work alternately.

After flashing, the phone does not see the SIM card

The problem in the firmware is immediately visible, in addition to the failure of the smartphone to determine the SIM card, some functions stop working.
Solution two - return to a restore point or replace the firmware. You can do it yourself by connecting the gadget to a computer via USB cable and downloading licensed software from the official website, or contact the ASC (authorized service center).

Invalid imei

After checking the name, you realized that it was overwritten or did not match. How to recover? For all operating systems:

• open service menu with code:
  

  Universal code	*#3646633#	*#*#3646633#*#*
  Samsung	*#*#8255*#*#	*#*#4636*#*#
  HTC	*#*#3424*#*#	*#*#4636*#*#
  Sony	*#*#7378423*#*#
  iPhone	*#*#4634*#*#
  Huawei	*#*#2846579*#*#
  Philips, Fly, Alcatel	*#*#3646633*#*#
  Processor MTK	*#*#54298*#*#	*#*#3646633*#*#

  dial the combination as a number and press the "call" key;

• go to the item "CDS Information - Radio Information - Phone1";
• at the top under the AT+ item, enter in the field EGMR=1.7 "indicate the correct IMEI" - for the first SIM, or EGMR=1.10 "indicate the correct IMEI" - for the second Sim;
• press the "SEND AT COMMAND" button and the new settings will take effect;
• restart your smartphone.

You can fix your imei using the "Chamelephon" application if you have ROOT rights. You can always contact the service center to resolve the issue.

The phone sees the SIM card, but does not catch the network

Possible reasons when the SIM card does not see the network:

• breakdown in the device of the signal amplifier, connector, controller, antenna, radio path;
• software failure - network search does not start automatically;
• the communication standard does not correspond - the phone does not work on Russian GSM frequencies.

In the first case, going to the service is inevitable. In the second, you need to start the network search manually, and then change the device firmware. The third option occurs when the phone is bought abroad, for example, in a Chinese online store and is not able to work in our country - this cannot be fixed.
How to activate a SIM card if there is no network? Contact the operator's sales office, through your personal account or call technical support from a working number.

SIM card is not registered on the network

Check:

• the number is blocked - you can find out in personal account or by contacting the hotline;
• the microchip burned out - replace the SIM card with the operator;
• does not automatically search for a network - start a manual search;
• does not match the name - change the number yourself or contact the service center;
• offline mode enabled – disable the option.

The SIM card will not be able to register on the network if the firmware contains errors, the Sim itself is damaged, or there are malfunctions in the device.

SIM card not working - only emergency calls

Message "only emergency calls' exits when:

• not enough funds on the account - top up the balance;
• if you are outside the reception area - change your location;
• “offline mode” is enabled - turn off the function.

Help mobile operator

Issues related to the operation of the Sim card can and should be resolved with the operator. To do this, just call the support service or contact the customer service office.

Find the addresses of the nearest offices on the official websites of the operators.

When turned on, the phone writes “insert a SIM card” - the situation is unpleasant, but in most cases it is fixable. Let's figure it all out for you possible reasons why the phone does not see the sim card. Below we will try to find out what the problem is - in the SIM card or directly on the phone and what to do in such a situation.

5 reasons why the phone does not see the SIM card

• SIM card not working

Despite the fact that a SIM card is enough reliable device there are times when it stops working. Carefully remove the SIM card from the phone and carefully inspect for external damage. If the SIM card stopped working after you tried to cut it to a different format (micro or nano), the chip may have been hit and it has become unusable.

A great solution would be to first check the SIM card in a known-good phone.

If the SIM card looks good, gently wipe the contacts with a cloth soaked in alcohol and try to reinsert it into the phone. If it doesn't help, read on.

A defective SIM card will be replaced by the operator free of charge.

• Faulty SIM card holder

Another common reason why a smartphone does not see a SIM card is a loose SIM card holder connector. A malfunction is diagnosed by an external inspection of the holder for the integrity of the contacts. It is more difficult for those who do not have access to the holder, and this is almost all modern smartphones from non-removable lid. In this case, you can not do without disassembling the phone. It is better to entrust it to specialists.

If the contacts of the holder are in place, it makes sense to try the next trick. Stick one or two strips of adhesive tape on the SIM card and carefully cut it around the perimeter. This will allow you to press the SIM card a little harder to the contacts and provide a more reliable connection.

• phone is locked

Almost all mobile operators have locked phones for sale, that is, phones that work only with SIM cards of one mobile network. So, if you insert a "non-native" SIM card into such a phone, it will not work.

In this case, the phone will need to be unlocked. This is not difficult to do, but this is a topic for a separate article.

• Phone settings

This solution to the problem applies only to owners of two-SIM devices. In some models, you can programmatically disable one of the SIM card slots.

You can check this by going to settings => SIM card manager and see if your phone has this option.

IN push-button phones it might look like this.

• Phone malfunction

If none of the methods helped, most likely the phone itself is faulty. In this case, only a specialist can help determine the reason why the phone does not see the SIM card. service center.

Do not try to disassemble the phone yourself. If there is no experience, then with almost 100% certainty it will only get worse.

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 be unavailable. Sim card problems samsung galaxy may arise from different reasons. Some of them can be eliminated on their own, while others require more professional intervention. Let's look at why Samsung does not see SIM cards, and what to do in a particular case.

Top Causes of SIM Card Issues 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 grouped into three groups:

1. Mechanical failures mobile device. They occur when the card is frequently removed / inserted into the SIM slot, the device is damaged as a result of a strong blow 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, the expiration of the SIM card or its blocking by the operator.
3. Failures in the operation of the operating system or installed software. Samsung may not see the SIM card after it software shutdown, due to installation unofficial firmware or by removing the IMEI number.

Let's consider each of options in details.

Mechanical damage to the mobile device and how to eliminate them

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

If there were no prerequisites for a Samsung breakdown, try the following:

Troubleshooting SIM Card Issues

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

Software failures

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

There are cases when, after infecting a smartphone with a virus or its self firmware NVRAM is damaged on it - non-volatile memory with random access. This is where it is stored Mobile IMEI devices. When you erase it, Samsung will not detect SIM cards.

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

After restart Phone IMEI recover and everything should work. If this did not help to get rid of the problem, you will only have to reset all settings to factory settings or reflash the smartphone via PC and Samsung program Kies.

The SIM card is an essential part of any cell phone. Without a SIM card, as we call it in a modern way, it is impossible to send and receive messages and calls. Unfortunately, no one is immune from the situation when the SIM card suddenly stops working. Or, for some reason, the new SIM card refuses to be friends with the phone. The phone immediately reports this trouble, asking you to insert a SIM card, although it is already inside.

Action plan:

How to proceed in similar situation? How to find out, why is the sim card not working? Below is detailed plan actions.

1. Open the phone, inspect the SIM card, evaluate its location in the slot. Perhaps the SIM has moved slightly, so its contact with the phone is lost. If you need to insert a SIM card in your phone under the battery, and not into the card reader nearby, then there is a high probability that the contacts of the SIM receiver and the SIM card simply do not touch. Try pressing the SIM into the slot with a small sheet of paper folded several times. Place the folded sheet between the SIM card and the battery and reassemble the phone. Perhaps the contact between the parts will be restored, and the SIM card will start working again.
2. Carefully inspect the contacts of the SIM receiver and SIM card. Are they contaminated? They may be the reason why sim card stopped working. Wipe with an ordinary eraser visible contacts, return the SIM card to its place and assemble the phone. Working?
3. Bend the SIM card slightly so that the side with the contacts is convex. At long-term use the SIM card heats up and deforms, and then the SIM contacts do not reach the slot.
4. Insert another SIM card into your phone. The best option There will be a SIM card of another operator. If it works, then the problem is in your SIM card: it is faulty. If and new sim card The phone does not see, so the problem is still in it.

In a conflict between a SIM card and a phone, as a rule, one of them is to blame.

If the phone is to blame

• Some phone models are “locked” for a specific operator, so such a phone simply will not see a “non-native” SIM card.

• For cell phones with two SIM cards, it often happens that sim card slot not working during the work of the second. Therefore, when examining the phone, you should insert the “doubtful” SIM card into both the first and second slots.

• Some physical damage can be detrimental to phone performance. For example, if water gets on the device (it fell into a puddle, or it rained on it), over time, the contact between the slot and the SIM card will be broken due to oxidation. You can try to solve this problem yourself: disassemble the phone and wipe the docking points of the loops responsible for the communication module with a napkin. If, after cleaning, the SIM did not work, then you will have to carry the phone to the service center and repent there that you overlooked your little friend.

Please note that the phone does not immediately respond to physical damage such as drops or water ingress. For a while it works as usual, but later it breaks. Therefore, if you have a phone in your hands that does not see a SIM card, try to remember if your friend had a chance to endure any trouble. Even a sudden change in temperature is detrimental to the operation of the SIM card. You bring your phone from cold winter into a warm house, and moisture condenses inside the unit. The solution here is simple: disassemble the phone, remove the SIM card and wipe it with a soft cloth.

If the sim is to blame

• Some SIM cards have an expiration date. If the SIM card is not used for a long time, it is blocked and turns into a useless plate. Also, a SIM card can be blocked due to a negative balance. Each operator has its own rules, and you need to know them.

• Some operators cellular communication allow activation of the SIM card only after the first paid action. As a rule, when buying a SIM card, you are informed about its correct activation.
• In many modern touch phones It does not work full-size, but a cropped SIM card. Sometimes owners of iPhones and other mobile devices cut the SIM card on their own, and then find that cut sim card not working. Perhaps the reason lies in the wrong pruning, so this process is best left to specialists in service centers. But first, if you mini sim not working, inspect it for dirt, restart the phone. The same inspection should be carried out if micro sim not working. After all, there is hope that you can solve the problem yourself.

Every mobile operator is interested in the loyalty of its customers, therefore, in almost all cities there are service centers where you can contact with your problem.

If the 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 able to perform its main function. The causes and ways to eliminate such problems should be considered in more detail.

Why is the SIM card not working?

Many users have experienced similar problem: the SIM card stopped working or immediately turned out to be inactive after it was installed in the 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 by unknown to the user reason.

No one is immune from such problems, so you should immediately consider all the possible causes of this situation.

Possible Causes of the Problem

Usually, such situations arise for the following reasons.:

• SIM card is not attached to the contact. It often happens that the size of a SIM card does not correspond to the volume of the slot (for example, if an employee of the corresponding center cut the card incorrectly), or the latter is simply loosened due to mechanical damage. In such cases, the mobile device writes that the SIM card is not detected.

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

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

• Damage on the map. It also happens that the SIM is corrupted. The fault may be scratches, splits, factory defects and so on. But one way or another, if the problem is in the SIM card, then it will need a replacement. Some mobile operators can make a duplicate of your SIM for free in this case, without losing the number and the information on it.

• Contact damage. This happens when the user frequently rearranges the card. The fault will be mechanical damage, which cannot be avoided by careless operation of the device. In this situation, only urgent repair 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 following options will help you:

• Restart mobile. When you turn it on, wait full load devices. Sometimes this needs to be repeated several times. If the card is still not detected, then turn off the phone. Take the sim out of it and put it back in. 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 remove all contaminants, and if the card was rejected by the device 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 along with this, the SIM card fits snugly to the contacts.

If the problem is with the phone itself

It may be in your smartphone, and not in the SIM card. Checking this is pretty easy - just insert the card into another device.

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

AND It could have arisen for one of the following reasons.:

Related videos:

Troubleshooting after flashing

After unsuccessful firmware there may be many problems, including problems with reading the SIM card.

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

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

It will be useful to see:

Incorrect firmware is easily corrected by a service center specialist, but it is not recommended to try to solve the problem yourself. After all, in this case, you run the risk of repeating history or completely irreversibly spoiling the phone.

BUT experienced master will be able to set up your smartphone without questions in less than an hour, along with this, providing you with a guarantee stable operation mobile device in the future.

If there is a problem with the SIM card

So Alternative option- Sim problems. 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 another SIM card is read by the phone without problems, and even another communication device cannot see the previous one, then the problem definitely arose in the card.

BUT the reason may be the following:

• SIM has expired. standard map capable of working 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 overtaken by 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, you need to check with your operator.
• Mechanical damage. Incorrect trimming, scratches, breakage of contacts, severe abrasions, splits, etc. - all this is attributed to mechanical damage, after which the SIM card will not work or malfunction.

Along with this, they understand that the subscriber would not want to lose his number, the options installed on it, the saved contacts and the funds that remained on the balance.

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

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