Hard Reset HUAWEI Ascend G620s

First method:

1. First of all switch off the phone by holding the Power button.
2. Then press and hold the Volume Up and Power button for a couple of sconds.
3. You can release held keys when you see an Andoid image.
4. Afterwards press the Power button to enter Recovery Mode.
5. Press Volume Down to choose "wipe data/factory reset", and then push the Power button to confirm.
6. Select "Yes--delete all user data". Use Volume Down button to scroll and Power key to select.
7. To restart the phone, select "reboot system now".
8. Success! The hard reset is done!

Second method:

1. If the display is off, press the Power to turn it back on. 
2. Go to Settings and then to Backup & Reset.
3. Tap Factory data reset. 
4. Choose Reset phone and select Erase everything.
5. Well done!

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