Apple phones can't send text messages.

1. Regarding the failure of sending by iMessage, first of all, of course, it is necessary to confirm whether the current mobile network signal of iPhone is normal. In some signal blind areas, such as elevators and toilets, it is normal to send text messages.

2. If it is confirmed that there is no problem with the iPhone signal and the call is normal, then you can try to restart the phone at this time, press and hold the power button of the phone, slide it down and then turn it on.

3. If you still can't send SMS after restarting, you can try to restore the network settings of iPhone. Settings-General-Restore list can be solved by restoring network settings.

4. If it still doesn't work after restoring the network settings, it is recommended to call the operator's customer service and ask them to check the data in the background of the mobile phone to see if there is any problem.

It seems to be the operator's problem. Restart the phone and see if it can be solved.

Most new iPhone will encounter this situation, or contact the former mobile operator for advice on how to solve it. If not, you can go to the business hall and get a new card, which will basically solve the problem.