2. At the same time, press the Volume Down(-) button for a few seconds and the POWER button.
3. Release the buttons you retain when the OPPO logo appears.
4. Select English Using the Volume Up(+)/Down(-) buttons to go through the menu items and the POWER button to make a choice.
5. Select Wipe Data, and then Wipe Data.
6. Press OK to confirm the selection.
7. Press reboot.
Hard Reset - advantages and disadvantages Oppo R15 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. Removing viruses that have entered your phone. 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. Unfortunately, in some cases, not all viruses on Android will be removed, even after a hard reset.
What needs to be done before the Hard Reset operation.
If you want to do a hard reset on your phone, then make sure you know the login / password for 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 important information (contacts, photos, videos) remains in the memory of your phone, then it 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.