How to solve the problem that the SIM card of mobile phone cannot be read?

If you can't identify the SIM card when using the vivo mobile phone, you can refer to the following methods for troubleshooting:

1. Please restart the phone, and the phone will re-read the SIM card to see if it can be used again.

2. Go to mobile phone settings-mobile network/dual card and mobile network-SIM card information and settings-click to enter the corresponding SIM card-enable the SIM card, and ensure that the switch is turned on;

3. Please refer to the card loading steps in the user manual to see if the SIM card is loaded in the right direction.

* Check the card loading steps: enter Settings-System Management/More Settings-Customer Service-User Manual-Mobile Phone Overview and Quick Start-Installation and Preparation;

4. Observe whether there are stains on the metal surface of the SIM card, and clean the stains on the surface of the SIM card to avoid the SIM card from being unrecognizable due to poor contact. If the cut SIM card is used, the shape of the SIM card may be nonstandard, resulting in poor contact. It is recommended to go to the operator's business hall and replace it with a standard SIM card.

5. If two telecom cards are used at the same time, the secondary card (non-data card) needs to open the VoLTE service (you can contact the operator to open it), and the network can only be registered within the coverage of the VoLTE network;

6. Please install the SIM card on other devices, or install other SIM cards on your mobile phone for comparative test to determine whether the SIM card is faulty. If it is a SIM card problem, it is recommended to replace the SIM card in the operator's business hall;

7. If the above methods can't be solved, please back up the mobile phone data in advance and take the mobile phone and purchase certificate to the vivo customer service center for testing. The address and contact information of the service center can be found in vivo official website-Services-outlets-Select your province and city-and check the local customer service center. ?