What if Cool God f2 doesn't ring when it receives the text message?

1, please confirm whether the SMS function is normal and whether all numbers can't send and receive SMS;

2. Confirm the number of the SMS center with the operator and check whether the number of the center is correct;

3. Uninstall the SMS software downloaded by the mobile phone and cancel the blacklist setting;

4. Try to change the card;

5. After the mobile phone data is backed up, the factory settings can be restored through system update.