2. Press and hold the Volume Down(-) and POWER button for a few seconds.
3. Release the POWER button when you see the OPPO logo.
4. When Recovery mode appears on the screen of your smartphone, release the Volume down button.
5. Select english.
6. Click on Wipe Data and Format Data.
7. Select Format to confirm this operation.
8. Press OK.
Hard Reset - advantages and disadvantages Oppo F9 Pro?
In simple words, Hard Reset means hard resetting the phone. As a result, the system automatically returns to the factory settings and the system is completely cleared. Contacts, correspondence, application, files, search queries, passwords - all of this is deleted from the device's memory.
Benefits of Hard Reset:
The ability to get a completely clean phone from user settings and data. Removal of viruses that interfere with the normal operation of applications and the system. Solving problems that have arisen on the device, for example, between the camera and other applications.
Disadvantages of Hard Reset:
All data and applications will be permanently deleted. The need to back up contacts, settings and media files. In some cases, it is impossible to remove all viruses from Android, even after a hard reset.
What needs to be done before the Hard Reset operation.
So that after a hard reset you can use your phone, make sure you know the login / password to your google account. So that, after performing a factory reset, you do not need to remember the login password for the google account, you can log out of the google account before the hard reset. If after a hard reset you cannot remember the login and password for entering your Google account, then you need to find instructions on bypassing the FRP blocking. Some new phone models may have problems with bypassing the FRP protection and for this you will need to contact the official service center.
After performing a hard reset, your device will be completely wiped clean. Everything that was in the memory of your device will be deleted.
What can be done to avoid losing important information?
If personal data (contacts, photos, videos) remains in the memory of your phone, then they can be saved in several ways:
Sync your data with Google contacts, Google drive. Using the Titanium Backup program, create a backup. With the service programs for your phone, you can transfer contacts, media files, and important data to your PC.