Huawei Ascend G620s hard reset using buttons1. Turn your G620s phone off.
2. Press volume up + power, after android logo appears release the power button.
3. In recovery menu go to Factory reset/wipe data with Volume button.
4. Confirm using power and reboot system.
If your phone is responding to screen input, then open Settings from the Applications menu. Tap Backup & reset > Factory data reset; click Reset phone and then Erase everything to format your phone.
Unlocking Your Mobile Phone If You Forget the Screen Lock Pattern
If you have already created a Google account, you can unlock your mobile phone
using the following methods.
After you have entered the wrong sequence five times, a Forgot pattern? button will appear. Touch this button to enter the Google account interface. After you have entered your Google account password, you will be able to reset the unlock pattern.
After you have entered the wrong pattern twenty times, you will be taken directly to the Google account interface. After you have entered your Google account password, you will be able to reset the unlock pattern.