Lenovo mobile phone 2g network can't make phone calls and send text messages.

Lenovo mobile phone can't make calls and send and receive short messages under 2G network. The suggestions are as follows:

1, unplug the SIM card and try to restart the phone;

2. Verify whether the third-party address book dialing software is uninstalled; Clean up the dial-up software cache;

3. Restore the default settings of SMS;

4. Verify whether a black-and-white list is set and whether the mobile phone card is in arrears;

5. Try to change the card in the network environment;

6, backup data to prevent data loss, restore the factory settings.

7. If it is invalid, please contact the after-sales site for testing.