1. To start, turn off your phone with the POWER button.
2. Press and hold the Volume Up(+), POWER, Home buttons at the same time for a few seconds.
3. Release the held buttons when you see the Samsung logo.
4. Select wipe data / factory reset from the menu, using the Volume Down(-) buttons to navigate through the menu options and the POWER button to confirm.
5. Select Yes - delete all user data from the menu and press the POWER button to confirm the operation.
6. The phone deletes all personal data, settings and downloaded programs.
7. Select "reboot system now" from the menu and press the POWER button to confirm the operation.
Hard Reset - advantages and disadvantages Samsung I9105 Galaxy S II Plus?
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, thereby improving its performance. Removing viruses that have entered your phone. Solving various problems on the device that arise due to the conflict of applications.
Disadvantages of Hard Reset:
All your contacts, data and media files will be deleted. The need to have a fresh backup. 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. Before a hard reset, you must first log out of your google account. In this case, after performing a factory reset, the phone will not be locked by the FRP. If, after a factory reset, the phone is locked because you cannot log into your Google account, then you need to find instructions for bypassing the FRP lock for your phone model. 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, 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. Backup your contacts and information. Using the service programs for your phone model, you can transfer important data to your PC.