SIM card is not detected. Why does the MTS SIM card not work on the phone: reasons and what to do? Repair IMEI using SP Flash Tool
Your phone doesn't see your SIM card and you can't get in touch? The first group of reasons is a problem in the SIM card itself, the second is problems in the device. We will describe in detail all situations and what to do in each specific 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. Below is a description of what causes each situation. Find out what works for you and find out how to fix the problem.
The card has expired
There is no regulated shelf life for Sim, nor is there a service life. For correct operation The norm is a period of seven years. 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, if it gets into water or other liquids - the oxidation process begins, what type of device it was on before and is now on - different power levels of gadgets.
If the SIM card lasts a long time and stops working, replace it with your operator. Contact an official point of sale with your passport.
Remember that the service will be provided only to the owner of the number, or to a representative with a power of attorney confirmed by a notary.
The card 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 chipped, or the shape of the card is damaged, the gadget may not recognize the SIM card due to its incorrect location in the device slot.
Solution - Sim replacement and receiving a duplicate while maintaining the number and balance. Tele2 operator will replace the card when personal address owner to the subscriber service point. The procedure requires verification of identity; bring your passport. To receive 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 store, a special stapler with the exact size of the new shape is used to cut SIM cards. The risk is minimal, but there is a risk when old-format SIM cards with a wide contact field are used for cropping. Self-circumcision with scissors can also cause damage. As a result, the device does not see the Sim.
There is only one way out - getting a duplicate. The situation can be prevented if, when purchasing starter pack choose immediately correct format, and to change from micro/nano Sim to mini Sim, purchase plastic adapters.
Damaged SIM card contacts
The SIM card has contacts:
- Vcc – power supply;
- Reset – control;
- Cloc – clock frequency;
- Vpp – for recording information;
- I/O – input/output;
- General (“ground”).
Damage to any contact leads to failure. You will have to apply for a new SIM.
The SIM card is slightly dirty
If there is contamination, use the following cleaning methods:
- eraser - rub gently Sim contacts regular eraser for erasing;
- alcohol - with a slightly moistened disk, wipe the SIM card on all sides.
You cannot wash it in water or with cleaning products, as such actions will damage it. If cleaning does not produce results, replace the Sim with a new one.
Any problem with the SIM card can be solved by replacing it with a new one. All operators provide the service free of charge, regardless of the reason.
The problem is in the phone
Let's move on to the second group, in which the problem “SIM not working” depends on the phone. Some reasons can be eliminated on your own, others will require contacting service center.
Incorrect settings
Why doesn't my phone see the SIM card?
- Check to see if you have Airplane mode or offline mode" When airplane mode is turned 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 reinsert it. Reboot your phone/tablet.
- Check if the SIM card is enabled in the phone settings; this is important for devices with two or more SIM cards on Android:
- go to settings options;
- select “Sim Card Manager”;
- activate the desired SIM card by clicking on it, or switch the slider next to it to “on” mode.
If it doesn't help, try sending a message with an inactive Sim and the system will automatically ask you to enable the card.
- Can't see the phone new sim card - activation failed. What to do:
- install the SIM, turn on the device;
- enter the PIN code (indicated on the plastic blister where the Sim was attached);
- make a call to toll free number activation.
- No online registration. Required manual search nearest station via settings:
- select settings;
- click additional settings;
- tap mobile networks.
The device will start searching for all available operators and display a list of possible connections. Select what you need and activate it.
If none of the methods work, do full reset settings: “settings” – “backup and reset” – “data reset”. Pre-archive data for auto recovery.
The phone is tied to a specific operator
When you buy a phone at a dealership at a promotion with a big discount, most likely it is automatically tied to a specific operator. To find out whether this is true or not, take a SIM card from another operator and insert it into the device. No connection? Your model is tied to a specific operator.
There are two options to resolve the issue:
- contact the service center, where they will make changes to the software using special equipment;
- change the software yourself.
The second option carries the risk of incorrectly changing the software and causing the device to fail. The most harmless way is to search for another operator manually (described in paragraph 4 of the section above), but it does not always help.
SIM card slot damaged
This problem occurs due to frequent changes of SIM cards, ingress of water, sand and dust, iron oxidation, shaking and falling of the gadget. What to do? First, clean the slot in the device. Treat with alcohol and check that there are no dents or other defects. Has some contact been broken? The part is broken. It is not recommended to disassemble the device yourself; contact service.
SIM card holder is faulty
Another reason why the smartphone does not see the SIM card is the deformation of the holder. The SIM card does not fit tightly into the slot in the phone and there is no contact. Place a piece of tape on the SIM card or place a folded piece of paper. Sim will fit more tightly 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.
Broken soldering of cardholder contacts
During the operation of the smartphone, dirt, water gets inside, mechanical damage is possible, and as a result, the contacts of the card holder come off. If you encounter this problem, do not carry out repairs yourself. Take the device to a service center.
Operating system malfunction or software
The phone may not see Sim due to an operating system update. For example, when setting 10 Windows versions Phone system does not have time to complete initialization and issues a code ahead of time absence of Sim. Solutions:
- “roll back” the software to previous version;
- return to factory settings.
For correct operation, install licensed software. It is guaranteed that the problem can be solved at the service center.
The phone does not recognize the second SIM card
When the SIM card does not work in the second slot, first check that the SIM itself is working. Move it to another working device, if everything works, then the problem is in the phone. What could be:
- incorrect change of firmware or software - reinstall the operating system from the manufacturer’s official website or reset the settings to factory settings;
- incorrect settings - enable Sim in the device manager, or send an SMS from an inactive SIM card;
- IMEI error - check the number on the case and in the device program for consistency using command #06#.
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 smartphone’s refusal to detect the SIM card, some functions stop working.
Solution two - return to the restore point or replace the firmware. You can do it yourself by connecting the gadget to your computer via USB cable and download the licensed software from the official website, or contact the ASC (authorized service center).
Invalid imei
After checking it, you realized that it was worn out or did not match. How to recover? For all operating systems:
- open service menu using 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 “CDS Information – Radio Information – Phone1”;
- at the top under the AT+ item, enter in the field EGMR=1.7 “enter the correct IMEI” - for the first SIM card, or EGMR=1.10 “enter 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 it 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 connect to the network
Possible reasons when the SIM card does not see the network:
- breakdown in 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, a trip to the service center is inevitable. In the second, you need to start searching for the network manually, and then change the device firmware. The third option occurs when the phone was purchased 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 has burned out - replace the SIM card from the operator;
- does not search for the network automatically - start a manual search;
- does not match have - change the number yourself or contact the service center;
- Offline mode is 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 is a problem with the device.
SIM card does not work - only emergency calls
The message "only emergency calls" comes out when:
- There are not enough funds in the account - top up the balance;
- If you are outside the reception area, change your location;
- "offline mode" is enabled - turn off the function.
Mobile operator help
Questions related to work 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.
There are a number of reasons why a mobile phone or smartphone does not detect the presence of a SIM card. What are the most common causes of such a malfunction, and what to do under such circumstances? In most situations, the culprit that the phone does not see the SIM card is the device itself or the SIM itself.
What can be done?
The first step is to open the back of the phone and remove the battery. This will allow you to access the SIM card. There are several options why the smartphone does not see the SIM.
- There is a possibility that the device does not see the card because it has moved relative to the slot. In this case, the contacts of the chip and the SIM receiver do not touch. What to do? Place the card in its original position.
- If the SIM card is not in tight contact with the SIM receiver, you need to use plain paper folded several times. This piece should be placed between the SIM card and the device’s battery, and then closed back cover device and turn it on.
- Another reason that the phone does not see the SIM may be that the contacts of the chip and the SIM receiver are clogged. If traces of dirt or sand are found during the inspection, it is necessary to treat such areas with a microfiber cloth soaked in alcohol or a regular eraser.
- You can also try to use any other working SIM. If a mobile phone or smartphone detects it, then the problem is in the card, and the device has nothing to do with it.
Problem with the device
Below are some of the most common cases when a smartphone or phone does not see a SIM card.
- The device is programmed for a SIM card of a specific operator. Often the price of imported mobile phones or smartphones is lower than similar models from other suppliers. This is due to the programming of such devices for a specific operator. cellular communications. In Russia, such phones are not uncommon. What to do in this case? When purchasing a new device, you need to insert your operator's SIM card and try to make a test call.
- The SIM card slot is damaged. This is one of the most common factors in the problem under consideration, associated with frequent changes of SIM cards by the user, the phone falling into water, falling from a height onto a hard surface, and other stressful influences. Such cases may result in damage to the card holder. In this case, the malfunction may not appear immediately, but will make itself felt over time. Also, the operation of the device may be affected by sudden changes in temperature conditions and other physical operating parameters.
- Incorrect installation. Mobile phone or the smartphone may stop seeing the SIM card after incorrect installation updated device software. What to do in this case? To restore the device's functionality, it is necessary to install a factory modification operating shell or reflash it.
- The phone didn't boot up completely. The more functional a mobile phone or smartphone is, the more it contains random access memory And more powerful processor, the longer the time it takes for all programs and services of the device to load after turning on the device. This may be the reason why the SIM card is detected after some time. You need to wait until the phone is fully loaded and perhaps the SIM card will be detected.
The reason is in the SIM card
There are a number of reasons why the phone does not see the SIM card, related specifically to defects in the card itself.
- If the SIM card is not used for a long time or is negative, it may be. Typically, such conditions are specified in the contract and can be clarified with the company providing communication services.
- There are operators who, after the first paid action, be it a call or a sent text message.
- Incorrect cutting of a regular SIM card to mini-SIM, or. Many users prefer to reduce the size of the SIM card themselves and in the process spoil contact pad chip. What should I do to avoid this? You can use the services of specialists in mobile phone stores or pre-order a card the right size from your operator.
- The SIM card may be damaged during operation or when left outside the telephone. In addition, if you frequently remove and reinsert the SIM card into the phone, it may also become damaged.
» » Why doesn't my phone see the SIM card?
Greetings, dear readers! Today we will try to fully answer the question: “Why doesn’t the smartphone see the SIM card?” Many people sooner or later encounter a problem when the SIM card is not recognized due to unknown problems. And there are many reasons for this. Now we will tell you everything possible reasons and how to deal with them. Go!
1. Incorrectly inserted SIM card
The first common problem is that the SIM card is incorrectly inserted into the slot and only emergency calls are available to you. It could have moved, been inserted the wrong way around, not been pushed all the way into the slot, or come off.
To solve the problem, simply try to insert it correctly again. If it moves away, then you can push a small paper rectangle, folded several times, into the slot on top of the SIM card.
2. Pay attention to the sizes
Modern smartphones mainly use nano-SIM. However, a little earlier, most manufacturers (such as HTC, Samsung, Lenovo and others) used and still use micro-SIM. This creates a problem with the card being cut off under different types depending on the phone model change. There are cases when, when the card is reduced, the chip itself is affected. In this case, the SIM card stops working.
To prevent this from happening, please contact special services. And if such a problem has already happened to you, then call the service technical support your operator. MTS, Beeline, Megafon, Tele2 and many other operators have well-established technical support and in this case they will give you new SIM card with the same number. Tele2 also promises that all your money and tariff plan will be saved, and payment for the duplicate card will be transferred to your balance.
3. Chip is dirty
Believe it or not, this is another common problem. Old SIM cards may stop working due to the accumulation of dirt and oils from a person's fingers on their chip.
To solve the problem you will need a regular eraser. After turning off the smartphone, simply rub it on the chip and also clean the slot.
4. SIM card is disabled
A common problem on dual-SIM smartphones with the Android operating system. Your SIM card may simply be disabled in the settings.
To do this, go to “Settings”, enter the “SIM Card Management” section and enable the desired card. If this does not help, then you can try sending a message from a switched off SIM card. Then the system will prompt you to enable SIM. We confirm the activation and you don’t have to send SMS.
5. The SIM card is not detected after the update
Android often plays around with this. After a software update, the SIM card is not recognized.
Below we have provided several solutions that may help. Complete them in the order shown and after each check the functionality of the SIM card:
- Restart your smartphone;
- Rerun the update. Perhaps for the first time the installation process of important files was disrupted;
- Execute Hard Reset, i.e. reset settings to factory defaults. In this case, you need to save all important data and files before resetting as they will be deleted;
- You can also try to reflash your smartphone;
- If this does not help, then contact the service center to find out the reason from professionals.
6. Mobile phone is “locked”
This can often be found when buying an iPhone, designed for foreign audiences. Many of them only work with SIM cards certain operators. That's why your card doesn't work.
In this case, adapters or special Turbo SIM cards are used, or everything is decided at the operator level, i.e. the contract is rewritten.
7. The smartphone is the problem
In some cases, the problem is the smartphone itself, or rather its breakdown. So previously, you could drop it in a puddle or bathtub, get caught in the rain with your phone, or keep it in a room with high humidity. All this can lead to oxidation of the slot over time. Damage may also occur if the smartphone is dropped.
In the first cases, you can try wiping the SIM card entry point and the chip itself with alcohol. In case of failure or physical damage mobile phone, then the solution is repair at a service center.
So we have listed the main problems for you. We hope the article was useful. And if so, then subscribe to blog updates, and also find us on social networks VK, Twitter, Facebook and YouTube. Good luck fixing the problem!
Best regards, site team
Almost every user of mobile gadgets has encountered a situation where a smartphone “does not see” the SIM card. In such a situation, there is no need to panic and rush into all seriousness, in the sense of dragging the phone to the nearest service center. The cause of the malfunction may be insignificant, and contacting certified specialists in in this case will only empty your pocket of a certain amount of banknotes.
Reasons why the phone does not see the SIM card
After reading the material presented below, you can get an answer to the question “why doesn’t the phone see the SIM card?” The main reasons for this behavior are given mobile device and options for getting out of this situation are given.
It is important to know
All SIM card detection errors are divided into two large categories: software and hardware.
Most often, an Android phone does not see the SIM card due to software errors. The most common of them are presented below.
SIM card disabled in operating system settings
SIM card can be simply disabled in the smartphone settings. This situation sometimes happens when buying a new mobile device. To enable SIM, you need to do the following simple manipulations:
note
If the card is activated, but the gadget still does not see it, you can try to perform some action with it (for example, send a short text message). Sometimes this method helps to get the SIM to work.
Airplane mode activated
If flight mode (or “On an airplane”) is turned on, the communication module is automatically deactivated and the Android smartphone does not see SIM card because it becomes unavailable. If this operating mode is accidentally enabled, it can be deactivated by following these steps:
System update problems
From time to time (infrequently, but this still happens sometimes) problems arise with the operation of the mobile device after the next update of the Android operating system. In this case, there are two options to solve the problem:
- Roll back the software to the previous version of the system firmware.
- Wait for the exit next version, in which this “bug” will be fixed.
Consequences of flashing the device with new software
If the Android device does not see the SIM card after the user, then to correct the error it is recommended to return to using the old software modification or repeat the process again.
Removed IMEI serial number
Every smartphone has unique number IMEI, by which it is uniquely identified. There are cases when, after some user action (firmware update, resetting the smartphone to factory settings), deletion occurs given number from a special section of the smartphone’s memory, which makes it impossible to identify the inserted SIM card.
note
You can check the presence or absence of IMEI by typing *06# on your smartphone keyboard. If the system does not give any number, then the IMEI is missing.
To return the device to operational state necessary on the phone. There are plenty of instructions on how to do this on the Internet. Myself the process is quite complicated regular user, Therefore, if you have the slightest doubt in your own abilities, it is better to contact qualified service center specialists.
General failure of the mobile operating system
If operating system slows down and works unstably, while periodically “losing” the SIM card, thereby the best option The way out of this situation will be to reset the smartphone settings to . The procedure in this case is as follows:
note
The above menu item names may vary for devices from different manufacturers.
Hardware problems when detecting a SIM card
So, with software errors The definition of SIM is more or less clear. Now let’s figure out what to do if your Android phone does not see the SIM card due to malfunctions in the device’s hardware. List of main possible problems with smartphone hardware and options for solving problems with it are presented below.