Why can't Apple send text messages?

Taking Apple 1 1 and iOS 14.2 systems as examples, the reasons why Apple's mobile phone can't send short messages and the solutions are as follows:

1. Check whether the mobile phone is in arrears. When the mobile phone is in arrears, you can't use the functions of sending and receiving text messages, making phone calls, etc., and you should recharge the phone bill in time.

2. Check whether the cell phone signal is good. If the cell phone signal is blocked or the signal is not good, it will affect the sending of short messages. Move to a place with a good signal and try to send it again.

3. Maybe the SIM card is loose or damaged. Plug and unplug the SIM card again, or replace it with a new SIM card to see if it can be used normally.

4. It may also be caused by system failure. Click "Settings", click "General", find the "Restore" option in the drop-down list, click "Restore Network Settings", and then restart the phone to see if it can be solved.

5. Important data can also be backed up and restored to factory settings, or sent to after-sales maintenance.

This answer applies to most of Apple's mobile phone models.