What is the reason why Apple 4S sends a text message to others, indicating that it has not been delivered yet?

The reason why the monitor was not delivered may be:

1, the mobile phone is in arrears.

2. The 2.SMS center code is incorrect.

solution

First, mobile phone arrears: mobile phone arrears can reuse the SMS function.

Second, the SMS center code is incorrect.

1. Enter the main interface of the mobile phone and enter "SMS".

2. In the SMS interface, select "More" in the upper right corner.

3. Select "Settings" in the pop-up box.

4. Enter the SMS setting center and click "SMS Center".

5. Enter the correct number to ensure the normal SMS function, such as+8611* *11,where * * * enter the last three digits of the domestic area code, such as