2. You need to click at the same time and hold the Volume down and POWER and POWER buttons for a few seconds.
3. Release all keys when recovery mode appears .
4. Select English.
5. Press Wipe Data and Format Data.
6. Press OK to confirm the selection.
7. Once again, press OK.
Hard Reset - advantages and disadvantages Oppo A91?
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 reset the phone to factory settings. Removal of viruses that interfere with the normal functioning of the device. Solving various problems that arose on the device after installing some applications and did not disappear after uninstalling them.
Disadvantages of Hard Reset:
All data and applications on the device will be deleted. The need to have a fresh backup. In rare cases, it is impossible to remove some viruses from Android, even after a hard reset.
What needs to be done before the Hard Reset operation.
So that after a hard reset the phone is not blocked by the FRP, make sure that you know the login / password to your google account. You can sign out of your google account before resetting. In this case, after performing a factory reset, you can immediately use your device. If after a hard reset the phone is locked and you cannot remember the login and password to enter your Google account, then you need to bypass the FRP lock. Owners of modern phone models will need to contact the official service center to bypass the protection of the FRP.
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 important information (contacts, sms, photos, videos) remains in the memory of your device, then there are the following options to save it:
Synchronize your phone with Google contacts, Google drive. Create a backup using Titanium Backup or other programs. Using the service programs for your phone model, you can transfer important data to your PC.