Mobile phones can't send text messages. What is the reason and how to solve it? Thank you.

If you can't send short messages by using vivo mobile phone, you can check it in the following ways:

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.

7. Take the mobile phone to the local vivo customer service center for testing and processing. (The address and detailed information of customer service center can be found in vivo official website APP- Services-My Services-Service Network-Select Current Province and City).