My phone is having the problem where the screen stays black during a phone call no matter what you do and the only way to get off the black screen is to do a battery pull. I have been told that flashing the phone with LS670ZVD will fix this issue. The phone is not rooted it is just version LS670ZVD... I want to just flash this on top of the other which is supposed to fix this bug... I cant seem to find the file, and honestly its been so long I cant remember how to flash to the optimus s, if anyone can help me it would be a big help.