In this tutorial I will gonna teach you how to hard reset your MyPhone A818. This is also works in MyPhone A818i, MyPhone Agua 2g/3g. I think this is universal in MyPhone, you can try this tutorial in your MyPhone also. This can fix the following issues that you are experiencing in your phone:
1. Force Close Apps
3. Hang in Logo
Ok lets do it. Just follow the procedure
1. HOLD Vol. Up and Down + Power Button
PRESS Vol. Up for Recovery Mode
3. Select Wipe Data/Factory Reset -- To select press the button next to Home Button.
Then Select Yes/Delete All Users Data
4. Then select Reboot
That's it your phone is back in its original state.