Excuse me, my mobile phone is 5c, but the reality is that there is no service, but I can make calls, answer phones and receive text messages, but I can't send text messages. My mobile phone is turned

Excuse me, my mobile phone is 5c, but the reality is that there is no service, but I can make calls, answer phones and receive text messages, but I can't send text messages. My mobile phone is turned on and there is no display. Show the possible causes and solutions of "no service":

1. Flight mode, just turn it off. Or the signal is weak, consult the operator.

2. No recognition (such as telecom SIM card for mobile phone)

3. Whether the check card trough is loose or deformed, send it for repair.

4. Restart the phone (if the battery is detachable, it is best to remove the battery and restart it).

5. Put the SIM card on another mobile phone and test whether the SIM card is faulty.

6. Software or system reasons. Brush machine, it is best to use official ROM.

7. Mobile phone hardware failure, sent for repair.