My OPPO phone can't get through and I can't answer it, and so can the SMS!

1, check whether the calling card has enough balance;

2. In the settings-about mobile phone-status information-SIM card status-signal strength, ensure that the absolute value of the displayed number is less than 95dB；;

3. Turn on the flight mode and then turn it off, and search for the signal again;

4. Change the time and place of contact person to eliminate network problems;

5. Enter *#2323# (some mobile and Unicom models) in the dial-up interface, and enter Settings-Mobile Network-Turn off 3G network or switch over 2G network;

6. It is recommended to replace the mobile phone card and check whether it is a SIM card problem;

If the above methods fail to solve your problem, please take the purchase invoice, warranty card and mobile phone to the nearest OPPO customer service center for testing and handling.