Oppo mobile phone completely empties all data.

You can go to "settings > system settings (other settings) > reset the phone (restore the phone)" and clear the corresponding content according to the options prompted by the phone.

(If the phone has a screen lock password, you need to enter the screen lock password for verification before you can clear the phone data. )

1. Restore wireless settings: Only restore wireless LAN, Bluetooth and mobile data networks.

2. Restore only system settings: Restore only system settings (all system settings in the settings).

3. Clear downloaded applications and application data: Clear your downloaded applications and application data (keep music, photos and other data).

4. Erase all data completely: Erase all data (including photos and music) in the mobile phone and restore the system settings.

5. Clear mobile phone contacts and call records: only clear mobile phone contacts and call records, and keep SIM card contacts.

6. Clear SMS and MMS: only clear SMS and MMS, and keep SIM card SMS.

Tips:

① Pay attention to the backup of mobile phone contacts, text messages, photos and applications before returning to the factory to avoid the loss of important data.

② if you have previously backed up the data through the functions of "settings > system settings (other settings) > data backup and migration (backup and recovery)", it is recommended that you copy the data to an external memory or computer for saving.

This answer applies to all OPPO models.