Why did Apple send a text message showing that there was no delivery?

Why hasn't the Apple SMS been sent yet?

1. The signal in the area where Apple's mobile phone is located is not good. Without a signal, you can't send text messages. Send text messages to places with good signals.

2, the mobile phone number is in arrears, texting costs money, and the user's mobile phone number is in arrears. In this case, SMS cannot be sent.

3. Just turn on the phone and turn it off.

4. The user is blacklisted by the other party.

5. The other party's mobile phone has no signal and is in shutdown or flight mode.

Solution:

If it is because the number of the SMS center is wrong after the mobile phone system is updated, the SMS cannot be sent. Try what:

1. Apple's mobile phone directly modified the number of SMS center, failed, execution error.

2. The recovery network settings are invalid.

3. Turn off and restart the volthe HD calling function, which is invalid.

4. Restart after re-plugging, which is invalid.

5. Changing the card to a 6s mobile phone is invalid.