This is happening RIGHT NOW. I was on a long phone call, about 30 minutes, and when I was done and took the phone away from my face, the usual "phone" screen didn't come back. The screen remains black, I can't accress any apps, at this point I don't know if the phone hung up or not. Everything seem locked. When I click on power button on top, all it does (it seems) is turn the backlighting on and off (because the 4 buttons on the bottom toggle b/w visible and invisible). Shucks! And I was really liking this phone... What do i do now to turn the darn thing off and get it back to normal? Thanks in advance!