Why does my card have a phone bill, but there is no signal and network, so the information can't be sent out?

If the mobile phone card cannot be used, please use the following methods to troubleshoot:

The 1SIM card has insufficient contact with the metal contact of the mobile phone, so it is recommended to try to insert the SIM card again.

2 change the machine to test whether the SIM card is faulty;

3 The location is a signal blind area or there is no signal suddenly;

4 mobile phone card arrears, downtime.

If it still can't be solved, I suggest you bring your SIM card and mobile phone to the local business hall for verification.