After installing a program called qt( it was supposed to boost the phone) my phone keeps restarting. If I put the usb and connect it to pc...it switches on but stays on lock screen and i can't do a thing. I tried to flash it but I've set it to "mass storage" before so it goes in this mode by itself when I put the usb in...and I read that it is supposed to be in sync mode to flash it...but how can I make it in sync mode when I can't even unlock it and go to home screen...pls HELP