What should I do if OPPO R7 software flashes back?

1, Settings-Apply-All-Find and click the software name with flashback-Clear data before use; 2. If it is invalid, please back up the important data in the mobile phone, and then restore the factory settings of the mobile phone (Settings-System "More"-Restore the factory settings, please do not check "Clear completely"); 3. If the mobile phone can detect the latest version, it is recommended to update the firmware version of the mobile phone. Operation: Settings-About Mobile Phone-System Update-Update (please back up the data in your mobile phone before upgrading). If the above methods fail to solve your problem, please contact the official customer service or take the purchase invoice, warranty card and mobile phone to the nearest OPPO customer service center for testing and processing.