N7 100 can answer the phone, send text messages and receive text messages, but can't make phone calls. What happened?

Hello! According to your description, we suggest that you:

1, I suggest you check whether the SIM card of your mobile phone has a balance.

2. Please contact the network operator to confirm whether your SIM card has started call barring service.

3. Turn off call restrictions (mobile phone-menu key-call settings-other settings-call restrictions-voice calls-cancel all call check attempts).

4. Back up mobile phone data (phone book, SMS, multimedia materials, etc.). ) and try to restore the phone factory settings (Settings-Reset-Restore Factory Settings).

Note: all the data stored in the mobile phone is lost, so it must be backed up to the sim card and sd card in advance before operation.

If the problem still exists, I suggest you take the three-guarantee certificate of your mobile phone to the nearest Samsung service center for inspection by an engineer.

For specific questions about the service center, please visit:

/support/location/supportservicelocation . do？ Page = service. Location and place. cid = cn _ PPC _ support _ service _ repair net _ 120522

I hope the above reply can help you and wish you a happy life!