Iphone 1 1 can't send text messages.

If your mobile phone can't send short messages, you can try to restart or change your mobile phone to test whether there are any of the following situations:

1. SMS center number is not set correctly. Please re-enter the correct SMS center number.

2. Blacklisted by SMS;

Third, the short message sending time exceeds 24 hours;

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 system is busy due to the peak of sending short messages during holidays. It is recommended that you try again later or avoid sending peak hours.

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

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

Eight, the quantity balance is insufficient.

If the problem cannot be solved by the above methods, it is suggested that you can contact your Unicom customer service for consultation and feedback. The specific situation is subject to local policies.