Hard Reset SAMSUNG Z400F Z4

First method:

1. At the very beginning switch off the smartphone by holding the Power key for a short while.
2. In the second step start pressing Volume Up + Home + Power key for a few seconds.
3. Release all keys when you see the Samsung Logo on the screen.
4. In Recovery Mode select "Phone reinitialization" by using Volume keys to scroll down and the Power button to confirm that.
5. Now select "Yes". Use Volume buttons to scroll down and the Power key to accept it.
6. Success! Now wait for a few moments and your smartphone will be ready to use.

See the Next method!

How to format Samsung Z4 Tizen

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