Why didn't you send a short message?

According to the situation you described, possible reasons and treatment methods:

1. There is a problem with the number setting of the SMS center. It is recommended to check whether the settings are correct.

2. There is no signal or the battery of the mobile phone is insufficient;

3. The system is busy during the peak period of holiday SMS sending. It is recommended that you try again later or avoid the peak sending time.

4. 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 SMS inbox and sending box are full;

6. Query whether Unicom card has SMS function.

If the above situation has not been solved, it is suggested that you can contact the local manual customer service for handling.