The phone suddenly cannot send text messages

If your mobile phone cannot send text messages, you can try to restart or change the mobile phone for testing, and check whether the following conditions exist:

1 The SMS center number is set incorrectly, please re-enter it correctly. SMS center number;

2 There is no signal or the mobile phone battery is low;

3 The system is busy due to the peak volume of SMS sending during holidays. It is recommended that you try again later or avoid sending. Peak period;

4 The sending format is incorrect. If sending a text message to a PHS user, the area code must be added before the number;

5 The SMS sending time exceeds 24 hours;

6 The mobile phone blocks the SMS sending function;

7 has been included in the SMS blacklist;

8. The balance of the number is insufficient;

9. The SMS inbox and sending box are full.