Apple's mobile phone can't send messages after updating its operator.

If the mobile phone can't send short messages, you can try to restart or replace the mobile phone for testing to check whether the following conditions exist:

1.SMS center number is set incorrectly. Please re-enter the correct SMS center number.

Second, there is no signal or the mobile phone battery is insufficient;

3. The system is busy during the peak period of holiday SMS sending, so it is suggested that you try again later or avoid the peak period of sending;

Fourth, the sending format is incorrect. If you send a short message to PHS users, you need to add the area code before the number;

5. The short message sending time exceeds 24 hours;

Sixth, the mobile phone shields the short message sending function;

7. Blacklisted by SMS;

8. Insufficient quantity balance;

Nine, SMS inbox and outbox are full.

Tips: If the above reasons cannot be solved, you can contact the local manual customer service or go to the business hall to confirm whether the SMS function is enabled and hand it over to the staff.