The phone does not recognize the new SIM card. After replacing the SIM card it does not work

A SIM card is a necessary part of any cell phone. Without a SIM card, as we call it in modern times, it is impossible to send and receive messages and calls. Unfortunately, no one is immune from the situation when a 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 problem, asking you to insert a SIM card, although it is already inside.

Action plan:

What to do in such a situation? How to find out why is the sim card not working?? Below is a detailed action plan.

1. Open the phone, inspect the SIM card, evaluate its location in the slot. Perhaps the SIM card has moved slightly, so its contact with the phone is lost. If in your phone the SIM card needs to be inserted under the battery, and not into the card reader next to it, 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 card to the slot using a small sheet of paper folded several times. Place the folded sheet between the SIM card and the battery and reassemble the phone. Perhaps 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 dirty? They may be the reason why SIM card stopped working. Wipe the visible contacts with a regular eraser, return the SIM card to its place and reassemble the phone. Works?
3. Bend the SIM card slightly so that the side with the contacts is convex. With prolonged use, the SIM card heats up and becomes deformed, and then the SIM card contacts do not reach the slot.
4. Insert another SIM card into your phone. The best option would be a SIM card from another operator. If it works, then the problem is with your SIM card: it is faulty. If the phone does not see the new SIM card, it means that the problem lies with it.

Why did this happen?

In a conflict between the SIM card and the 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.

• With cell phones with two SIM cards, it often happens that SIM card slot does not work when the second one is working. Therefore, when inspecting the phone, you should insert the “doubtful” SIM card into both the first and second slots.

• Some physical damage can have a detrimental effect on the phone's 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 with a napkin the joints of the cables responsible for the communication module. If even after cleaning the SIM card does not work, then you will have to take the phone to the service center and repent there that you didn’t look after your little friend.

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

If it's Sim's fault

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

• Some mobile operators allow SIM card activation only after the first paid action. As a rule, when purchasing a SIM card, you are informed about its correct activation.
• Many modern touchscreen phones use a cropped SIM card rather than a full-size one. Sometimes owners of iPhones and other mobile devices cut the SIM card on their own, and then discover that cut SIM card does not work. Perhaps the reason lies in improper pruning, so it is better to entrust this process to specialists in service centers. But first, if you mini sim card not working, inspect it for contamination, restart the phone. The same inspection should be carried out if micro sim card not working. After all, there remains hope that you can solve the problem yourself.

We contact operators

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

Today, phones are equipped with various additional features, but the most important function is still to ensure stable communication. Without providing 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 the SIM card, and the phone writes “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 a 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 fix the problem, you just need to remove the 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.

It often happens that the smartphone works, sees the flash drive, but does not see the SIM card. There are many reasons for this malfunction. From a banal blockage to a broken slot. Let's take a closer look below.

First you need check sim card on another mobile device. If it doesn’t work on another smartphone, it means the SIM card is blocked or has become unusable.

If the SIM card works on another smartphone, then it’s all about your device. You should reboot it and blow out the contacts. Or look in the settings. Airplane mode may be active. If none of this helps, then you need to take your mobile device to a service center.

Main reasons

Let's figure out what you can do if your phone doesn't see the SIM card.

Phone settings

You need to check your phone settings first. Is the SIM card turned on?. Since in some models it may be disabled by default. This most often happens in dual-SIM devices.

To do this, you need to go to the settings of your smartphone. Find function " ControlSimcards" Then find the disabled SIM card and turn it on.

Airplane mode enabled

If it turns out that you turned on the SIM card, but the phone does not see it, then look at the upper right corner of the screen. If you see there airplane image- this means that you have airplane mode turned on. In order to disable it, you need to go to “phone settings” - “advanced” - “airplane mode”. Disable it.

Incorrect update

The smartphone may not see the SIM card if the update is incorrect. In order to resolve this issue, needs to be reset mobile device back to factory settings. Before performing a reset, be sure to save a backup copy of your data on a flash card.

Phone problems

Let's look at some malfunctions that are directly related to the mobile gadget.

The smartphone is locked

When purchasing, some smartphones are flashed specially only for one operator. For example, in a smartphone locked to Beeline, SIM cards from MTS, Tele2, Megafon and other operators will not work. That is, SIM cards from another operator will not be compatible with this device. It is often quite difficult to correct such an error. To do this, you will have to reflash the gadget and at the same time lose the warranty.

The card reader is damaged

It's another matter if the card reader is damaged. The user himself will not be able to fix the problem. Therefore, it is best to contact a service center if simply cleaning the contacts with a damp cloth does not help. You can also try to insert the card correctly. It happens that many users ignore the instructions and insert the SIM card into the slot incorrectly.

Software glitches

An Android smartphone may not see the SIM card if the software is damaged. In this case it is recommended reset settings phone to factory settings. Or reflash the smartphone again. If this does not help, then contact the service center.

Firmware errors

If after flashing the phone the phone does not see the SIM card, then you need to reinstall it. reflash the device via a computer or install a communication patch via TWRP Recovery.

In addition to the fact that the phone does not see the SIM card, it can takes a long time to load after switching on, due to which the card is not detected. It is recommended to check it for viruses and remove all applications that you do not use. Clean Android with any specialized program.

IMEI glitches
Without the IMEI code, the smartphone will not be able to read the SIM card. This happens when data about him is erased from the phone. There are two ways to restore from. The first is with the help engineering menu.

Go to your phone settings.

Select the “About phone” item. Next, go to general information about it.

Select the IMEI code data and enter the information there. The code can usually be found on the back of the smartphone.

You can also restore IMEI using the flashtools program on your computer. To do this, install the utility on your computer and drivers for your phone. Then do the following:

SIM card problems

If everything is fine with the firmware, then there may be problems with the card itself. It may expire or be blocked. For this it is necessary contact the operator and solve this problem.

It is possible that the SIM card needs activation. To do this, you need to call a short service number. Once the card is activated, the owner can start using it.

You can contact operators to unblock a card or for any other reason at the following numbers:

• For Beeline– 0611 – 1 – 0, from landline – 8 800 550 05 00.
• For MTS– 0890, from the city – 8 800 550 05 00.
• For Megaphone– 611, from the city – 8 800 550 05 00.

It happens that the user I cut my SIM card incorrectly. To solve this problem, it is better to use the services of a specialist in this field.

If you remove a non-working card and find small physical damage, scratches or failures of gold plating, it is better to replace it.

If the phone sees the SIM card, but does not see the network, then the problem is either a damaged antenna or a faulty radio module. In both cases, it is better to take the smartphone to a service bureau.

Common causes of malfunctions on popular smartphones

The causes of breakdowns are divided into mechanical and software; let’s look at them in more detail.

Xiaomi

For example, breakdowns on Xiaomi phones can be as follows:

• The SIM card is poorly cut.
• Unstable contact.
• Does not support Russian operators.
• Mechanical breakdowns.

Recommended installTWRP. This utility is suitable for reviving a dead phone, and will also allow you to reflash or restore the phone's functionality.

Samsung

In Samsung there are problems the following reasons:

• Due to oxidation.
• Defects or breakdown of the telephone board.
• Incorrect software installation.

iOS

Common problems with SIM cards on iPhones:

• Contacts are oxidized.
• Contacts are damaged.
• Needs activation.
• Device glitch.

To solve these problems, download the iTunes program. Then it is installed and the user registers in it. Using it, you can restore your device. The utility contains a special function for recovery.

A SIM card, or SIM card, is the main component of any mobile device. Sometimes unpleasant cases happen when the phone does not see the SIM card. To understand what to do, you first need to find out the reasons Why doesn't my phone see the SIM card?.

First actions

The first step is to carefully examine the device. To do this, you need to turn off the device, remove the battery, and take out the non-working bag.
You need to check all the parameters:

1. Correct the SIM card. It probably moved due to strong shaking of the gadget, a fall or an impact, so the phone stopped seeing the SIM card;
2. Inspect the condition of the SIM card. Traces of dirt present may be the cause of failure. Quite gently but thoroughly wipe it with a specially treated napkin;
3. Press the SIM card to the case under the slot. The card holder may have become loose, therefore there is no contact. You can put a piece of paper. As an option, slightly bend the golden side so that it becomes voluminous;
4. Insert another SIM card. During normal operation, it follows that the device is not at fault.

SIM card problem

If it is determined that the smartphone does not see the SIM card due to a malfunction of the latter, you should study and find a solution to the problem:

• mechanical damage, scratches, wear and tear - this happens when it is frequently rearranged, carried in a pocket, purse or bag. The solution is to change the SIM card at any specialized communication store;
• the need for activation - often mobile operators prohibit the use of communication services before making a financial transaction, so the phone does not see the new SIM card. The way out is to replenish the balance by a certain amount;
• validity period - long-term use usually explains why the smartphone does not see the SIM card. The solution is to contact the nearest mobile phone office to replace the SIM;
• correction for nano-sim, micro-sim format - unprofessional work of a service center employee entails consequences such as invisibility by the device. The solution is to go back and demand to replace the damaged accessory;
• blocking - there are many reasons for blocking a subscriber. The solution is to call your operator's support service.

If your phone does not see the SIM card, then first of all you need to try to rewind the events associated with the phone in your head in reverse order. It is worth paying attention to the possible causes of the problem with the SIM card. If the phone stops seeing the map after being dropped, then firmware and software updates obviously won’t help. In the case when this happened without external influences, the reason may lie either in a expired SIM card or in bugs in the operating system. Let's understand everything in order.

No contact in SIM card slot

When you see the message “no SIM card” or “SIM card not inserted” on the screen of your smartphone, the first thing you should do is try to remove and insert the SIM card back. Perhaps the reason is simply that the contact in the SIM card slot has disappeared. This phenomenon is more often observed when using micro sim or nano sim through an adapter.

When removing, you should look at the cleanliness of the contacts of both the SIM card itself and the slot. Some debris may have gotten into the slot, preventing the card from being positioned correctly or preventing contact. Therefore, you should blow into it thoroughly. A vacuum cleaner can be used for a closed slot, but a mouth will do.

If there is dirt on the contacts of the card itself, it is usually enough to rub it on a cloth, preferably a rough one, for example, on jeans. Also, a school eraser for erasing pens will do the job perfectly. Although if you have marks on the contacts that are difficult to erase, then water probably got into the slot.

It also happens that the contact of the SIM card in the slot is lost due to insufficient pressure. In this case, it will help to lay a piece of paper folded several times, which should be positioned in such a way that when closing the phone lid, it will press the SIM card through the piece of paper.

SIM card died

The problem may lie in the SIM card itself. It doesn’t matter if your phone doesn’t see the SIM card of Beeline, MTS or anyone else. The SIM card has a limited validity period and could simply expire. Well, or Simka got tired and died before her appointed time. In any case, the second step of verification should be checking the SIM itself.

To check, put your SIM card into your friend’s phone, and his SIM card into yours. I think everything is clear here and it’s clear without me. If you don’t have a friend at hand, then you should go to the nearest office of your cellular company. There they will check it for you and, if necessary, replace it.

Hardware problems

If your phone does not see the SIM card, but another phone does and poking the SIM card into the slot no longer helps, the problem probably lies in the hardware of the phone. For example, in a slot, as it was for me:

As you can see, one of the contacts fell off, which was on its last legs and finally tired after the phone fell on the tiled floor.

When the SIM card slot is open, you should carefully inspect the slot for the presence of all contacts. It is also worth carefully inspecting the components around it. For a closed design, you can try to disassemble the phone and get to the slot. If you are not confident in your abilities, it is better to entrust the matter to a knowledgeable person.

If there are shadows like soot around any part, then it is burnt. Chips and cracks also occur on the housings of microcircuits, indicating their demise. But often the problem is invisible. There are microcircuits, popularly called “glasses” or “glasses”. Often it’s not even really a microcircuit, but a diode assembly in a glass case, but that doesn’t matter. The problem is that the contents of the glass are not soldered but pressed, and under strong mechanical stress the contact can move out and disappear. In this case, only replacement.

In some phone models, the slot is located or connected to a cable and you can independently replace it with a new one. But in most cases the slot is soldered directly to the board. In this case, it will not be possible to replace it at home and you will have to go to a service center.

In addition to the slot, the problem may also lie in the electronics. For example, problems in the communication module. Such things cannot be determined without special equipment.

Software part

There is a possibility that after flashing the firmware or updating the software, the phone will no longer see the SIM card. There are several possible reasons for this:

• The update failed, for example, any necessary file was not installed - Will have to reflash.
• Incompatibility of software with the hardware of your phone, especially with third-party firmware, such as Cinogen Mod and others. It's sad but I'll have to try a different version of the sewing.
• Errors in the program code or assembly files. There are proprietary firmwares collected by individuals. More often, such firmware is compiled for a specific model of a specific manufacturer. .

Very often, when updating or flashing the old version of files and applications, the old version of files and applications is not deleted. Instead, the new version of the files is installed on top. In this case, old errors migrate to the new firmware and give rise to additional problems. Therefore, when flashing firmware, it is necessary to completely format the device

I hope that the article helped to determine the cause and solve the problem. If you still have questions, you can find the answer in the video: I'm waiting for your comments.

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