Why can a mobile phone surf the Internet, but it can't make phone calls and send text messages?

1, check whether the number card is in arrears;

2. Restart the machine test;

3. Machine change and card change test;

4. Whether the signal is normal;

5. If you can dial after changing your mobile phone, there may be something wrong with the settings of your mobile phone. It is recommended to contact the mobile phone after-sales service. If you still can't dial after changing your mobile phone, there may be something wrong with the number card. You can check the number card in the business hall or call 10 10 for verification.