After I changed the V8 external screen in Glory Store, my mobile phone can't make calls. What should I do?

The common reasons why mobile phones can't answer calls and their solutions are as follows:

First, check whether the mobile phone is in arrears, and it is recommended to pay for recharging;

2. Check whether the mobile phone is set with call forwarding, flight mode, call barring, etc. Suggest canceling and try again;

3. Check whether the function or signal of the mobile phone is normal. It is recommended to change your mobile phone or location and try again.

Fourth, try to restart or change the phone to answer the phone;

5. Bring the mobile phone card to the local business hall for testing or replacement.