Hard Reset SAMSUNG T899 Ativ S
- First turn off the phone.
- Then press and hold together Volume Down button + Power button.
- When the string "Windows Phone" goes out, release only Power button.
- If you see exclamation mark in your screen, release other buttons.
- Next press in sequence: Volume Up -> Volume Down -> Power buton -> Volume Down.
- Now wait for reboot your device.
How to : Hard Reset ATIV S
Help! This doesn't work
Hard Reset will erase all of your data
All described operations you are doing at your own risk.