OPPO mobile phone is to call and answer the phone, and the screen is black.

OPPO mobile phone blocks the distance sensor at the receiver during a call (for example, close to the ear to answer), and the screen will go black at this time, which is a normal situation designed to prevent accidental touch.

If the distance sensor is not blocked during the call and the phone screen is black, it is suggested that you try the following operation methods:

1. Check whether the film blocks the distance sensor, and tear it off for observation.

2. If the version of the mobile phone system is not the latest, it is recommended to upgrade to the latest version.

3. after backing up the important information of the mobile phone (contacts, text messages, etc.), restore the mobile phone to the factory settings to see if the mobile phone can be restored to normal.

the above methods can't be solved. please back up your mobile phone data and bring your mobile phone, invoice and warranty card to the nearest OPPO customer service center for testing and processing.