Vivo sends a text message indicating that there is no number.

How to deal with the failure to send SMS:

1, check whether the number of the received information is 1 1 digits, and there can be no spaces before and after the number;

2. Go to Settings (Application and Permission-System Application Settings)-Information-More Settings-SMS Center Number, and check whether the SMS Center Number is correct. If the number is wrong, the SMS cannot be sent successfully;

3. Check whether the phone bill is sufficient. If the mobile phone card is in arrears, the short message cannot be sent successfully;

4. Please put the SIM card into another mobile phone, or put other SIM cards of the same operator into your own mobile phone, and send a short message test to determine whether it is a SIM card or a mobile phone. If the SIM card is damaged, I suggest you change it in the operator's business hall.

5. The new version of the system improves the compatibility and stability, and optimizes the performance. Please go to Settings-System Upgrade (some models are Settings-My Device -iQOOUI Version) to check the system version information. If it is not the latest version, I suggest you upgrade your experience;

6. Enter the phone settings-System Management/More Settings-Backup and reset/restore factory settings-restore all settings. Restoring all settings will not delete any data or media files, but will restore all settings of the mobile phone. Some third-party application accounts need to log in again. Please ensure that the use of some third-party software will not be affected before operation.