Hard Reset HUAWEI G7300

First method:

1. Phone must be turned off so press and hold Power button. 
2. Now open up dialer by pressing Call key.
3. Tap this code using keypad: ##258741
4. Next confirm Factory reset operation by clicking Call key. 
5. Now your phone will restart.
6. Success! your phone is now after operation and ready to use.

Second method:

1. Power on your device.
   
2. Next goto Settings -> Advanced settings -> Security -> Phone and SIM card and select option Reset your phone to the factory settings.
3. Then enter your password to confirm operation.
   * The default password is: 0000
4. Now wait to finish operation.
5. Good job!

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