5c can't send text messages.

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. Unrecognized (for example, mobile phone uses telecom SIM card)

3. Whether the check card trough is loose or deformed, and 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. If you brush the machine, you'd better use the official ROM.

7. Mobile phone hardware failure, sent for repair.