What should I do if my mobile phone card keeps showing no service?

If the mobile phone card does not have service when using a vivo mobile phone, you can refer to the following troubleshooting methods:

1. Please check whether you are using a metal protective case, magnetic protective case, magnetic holder, etc. Accessories, metal and magnetic materials can easily interfere with signal reception. It is recommended to remove the accessories to check;

2. If it is in a closed indoor environment (such as basement, elevator, etc.), the mobile phone signal may be blocked, causing the signal to change. If the signal is poor, you can go to the outdoor environment to check. If you are in a relatively remote area, the signal may be poor. You can judge whether it is due to network coverage through the surrounding mobile phone signals using the same operator's network; ?

3. Observe the SIM If there is dirt or oxidation on the metal surface of the card, you can check it after cleaning. If you use a cut SIM card, it is recommended to replace it with a standard SIM card, install the SIM card into other devices, or install other SIM cards into your own mobile phone for comparison testing to determine whether It is a SIM card failure. If it is due to the SIM card, it is recommended to go to the operator's business hall to replace the card;

4. You can enter Settings--System Management--Backup and Reset--Reset Network Settings (select Corresponding to the SIM card) - Reset the settings before using and viewing (resetting the network settings will delete and disconnect the connections and pairing records of WLAN, mobile data network, Bluetooth and other networks. It is recommended to back up the WiFi account and password and other data before operation. , you can enter the mobile phone cloud service--device cloud backup--backup data type--enable system data)?;

5. In the mobile phone settings--my device--iQOO Funtouch OS/monster/UI (For some models, go to Settings - System Upgrade) Check the interface to see if it is the latest version. If a push notification of a new version is detected, it is recommended to update to the latest version in time and check;

6. Enter settings --More Settings/System Management--Restore Factory Settings/Backup and Reset--Try to restore all settings (it is recommended to back up important data such as contacts, information, pictures, etc. in the phone first, and exit the vivo account and third-party software) Accounts, WeChat and other programs may need to be logged in again);

If the above operations do not solve the problem, it is recommended to bring your mobile phone to the vivo official customer service center for testing and checking. The service center address and contact information can be found on the vivo official website - Service-Click to view all in the branch query-select the province and city-inquiry for the nearest local customer service center.