How to set and test the failure of SMS sending?

1. If your mobile phone can't send short messages, you can try to restart or replace it to test whether there are any of the following situations: the number of the short message center is set incorrectly, please re-enter the correct number of the short message center; No signal or low battery; Due to the peak of holiday SMS sending, the system is busy. We suggest that you try again later or avoid the rush hour. The sending format is incorrect. If you send a short message to PHS users, you need to add the area code before the number; The sending time of the short message exceeds 24 hours; The mobile phone shields the short message sending function; Blacklisted by SMS; Insufficient quantity balance; SMS Inbox and Outbox are full.

2. 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.