Why can't the mobile phone make a call, and "confirm the network connection"! You can answer the phone, send text messages, receive text messages and surf the Internet, but you can't make phone calls.

It may be that the phone has set the no call setting in the call settings by mistake, which makes it impossible to make a call, but you can answer the phone, send text messages and surf the Internet.

You can take the following measures to troubleshoot: replace the sim card that normally answers the phone. If the problem is eliminated, it means that it is a problem with the sim card itself, and you can consult the operator to replace a new sim card; If the problem still exists, you can put the sim card of the problematic mobile phone into another normal mobile phone. If the problem is eliminated, the phone is set up. It is recommended to restart the phone or restore the factory settings after saving the contents of the phone.