Why can OPPO phones only make calls but not answer them? What should I do if I answer the phone and prompt SMS notification?

1, confirm whether the data network is on;

2. The network signal in the environment is poor, and there is no signal. It is recommended to download and observe in another network environment;

3. Replace SIM card to receive and download MMS for observation;

4. Back up mobile phone data (phone number, SMS, photos, etc.). ), restore the factory settings of the mobile phone or brush the machine to solve it;

None of the above methods can solve it. Please back up your mobile phone information and bring your mobile phone purchase invoice, warranty card and mobile phone to the nearest OPPO customer service center for testing and processing.