Hard Reset SAMSUNG G930F Galaxy S7

First method:

1. At the beginning switch off your device by holding the Power key for a short while.
2. In the next step press and hold together: Volume Up + Home + Power button for a couple of seconds.
3. You should release held keys when the Samsung Logo appears on the phone's screen.
4. After that select "wipe data / factory reset" using Volume buttons to navigate and Power buttonto confirm.
5. Then choose "Yes -- delete all user data" to confirm the whole operation.
6. When the Recovery Mode menu appears again select option "reboot system now".
7. Well done! The hard reset has just been performed.

Second method:

1. Start by turninng on the device by holding down the Power button.
2. From the Home Screen go to Menu and then to Settings.
3. Tap Backup & Reset and then Factory Data Reset.
4. Afterwards find and select Reset device.
5. To confirm your choice select Erase everything.
6. That's all. Wait to complete the operation.

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WARNING !
Hard Reset will erase all of your data
All described operations you are doing at your own risk.