Done by me
Android Windows 7 Error in lg p970 done from reset.
1. Turn off your phone.
2. Hold Volume down together with G button.
3. press the power button while still holding the Volume down and G button until it powers on.
4. mobile starting in SafeMode after full reset from --> Settings --> Privancy --> Factory data reset
there you card reset your optimus black with key combo
I hope this could help to others.
Thanks.
