Troubleshoot When Samsung Does Not See The Sim Card

Troubleshoot When Samsung Does Not See The Sim Card

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 on the Samsung Galaxy can occur for various reasons. Some of them can be eliminated independently, while others require more professional intervention. Let’s look at why Samsung does not see the SIM card, and what to do in a particular case.

The 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 malfunctions of the mobile device. Occur when you frequently remove / insert the card into the SIM slot, damage the device as a result of a strong blow or penetration of moisture under the case.
  2. Problems directly related to the SIM card. May be due to the presence on the printed circuit board of scratches, chips and other mechanical defects, the expiration of the SIM card or its blocking by the operator.
  3. Failures in the operating system or installed software. Samsung may not see the SIM card after it is disconnected, due to the installation of unofficial firmware, or through the removal of the IMEI number.

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

Mechanical damage to a mobile device and methods for their elimination

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

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

  1. Reboot your smartphone. The problem may lie in a single software failure.
  2. Take out the SIM card and put it in another phone. This will eliminate the malfunction of the SIM card itself.
  3. Make sure the card is installed correctly.
  4. Wipe the SIM and the connector on the mobile phone with a soft cloth dampened with alcohol. The cause of the malfunction may be commonplace pollution or oxidation of contacts.
  5. Press the SIM card to the card holder and place a piece of paper. There is a possibility that the SIM-card holder is simply loose.

Troubleshoot SIM Card Issues

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

  1. Call your operator’s support service and check if the card has been blocked. This can happen if you do not use the SIM card for a long time.
  2. If you have installed a new SIM card in your phone, it may not be activated. To activate you will need to deposit money into its balance.
  3. Visually inspect the SIM card for scuffs, scratches and other defects. If they are found, change the card at the nearest service center of your operator.
  4. If the SIM lay for a long time near the magnet, it could be demagnetized. In this case, you will also need to contact the mobile office.

Software crashes

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

There are cases when, after an infection of a smartphone with a virus or its independent firmware, NVRAM is damaged on it. non-volatile memory with random access. 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 need to restore IMEI. This can be done through the engineering menu:

  1. Turn off the device and remove the SIM card from it.
  2. Turn it on, and then use the numeric keypad to enter the combination # 3646633 # or # # 3646633 # # After that, you will be taken to the engineering menu.
  3. Open the CDC Information. Radio Information section.
  4. Go to the Phone 1 tab and in the top line after “AT ” type EGMR = 1.7, ”IMEI”. In quotation marks indicate the identifier of your mobile phone. It can be found under the back cover of the Samsung Galaxy.
  5. Confirm your changes by pressing SEND AT COMMAND.
  6. In the Phone 2 tab, enter IMEI for the second SIM. Only in this case, after “AT ” it is necessary to indicate “EGMR = 1.10,”.

After restarting the phone, IMEI will recover and everything should work. If this did not help to get rid of the problem, you only need to reset all the settings to the factory settings or reflash the smartphone through a PC and Samsung Kies program.