Why does the iPhone display no service and cannot make calls or send or receive text messages?

When an Apple mobile phone has a SIM card but displays a no-service status, it will cause you to be unable to make calls. There are several solutions:

1. Sometimes It may be caused by an error in the mobile phone system. You only need to turn off the phone and restart it to solve the problem.

2. It is also possible that you accidentally turned on the airplane mode on your phone. Open the Apple phone settings, click on airplane mode, and turn off this function to reappear the signal.

3. If the SIM card is not inserted properly, it will also cause the Apple phone to display a no-service status. Pull out the SIM card and reinsert it to see if it returns to normal. This phenomenon may also occur if the SIM card is damaged.

4. Restore the phone system settings. If it shows no service, it may be a problem with the Apple phone network system. Open Apple Settings, click General to enter, scroll down the page, click Restore, and restore network settings. If that doesn't work, click Erase all content and settings and try restoring the phone to factory settings.

5. Or it may be that the mobile phone is in arrears and has been stopped by the operator. It is recommended to pay the owed phone bill in time. If not, it may also be caused by the surrounding mobile phones encountering signal jammers. , blocked by a mobile phone signal jammer.

6. If the operator's signal in some barren mountainous areas is not covered, the iPhone will also display a no-service status when using it. This problem can be solved by walking out of the signal blind zone.

7. In addition, there may be a malfunction in the mobile phone hardware, and you need to go to Apple after-sales service for inspection and repair.