The SMS on Apple's 4 PLUS desktop is marked with a red exclamation mark, so I can't send a message. What should I do?

Hello, did you accidentally move something on your mobile phone? Either your mobile phone information is full, or there is something wrong with the internal parts of your mobile phone. Generally, you can't solve it yourself, so go to a specialized shop for maintenance! I hope I can help you.

In fact, your message was not sent successfully. You can try it several times. Maybe it's a network problem. You can also set SMS settings in it.

Specific reasons and their solutions

1. If you delete the system file and then restore the factory settings, it is still useless. ?

2. If you directly upgrade IOS5 to IOS6 system, you can update the system. ?

3. If you are the latest version of IOS6.0. 1, the update has not been updated. You need to download the IOS6.0. 1 system file from Apple's homepage, and then connect to iTunes. Press and hold the SHIFT key to restore the iTunes point, and the file selection will pop up. You can download the IOS6 system and update the system. ?