Hi As of a few days ago, I can no longer connect to any of my computers via USB cable. The phone charges, but neither MTP nor USB Mass Storage Mode is enabled. There is no option to select which mode I want in the notifications bar, I cannot find any setting that would enable mass storage mode, and my computers register nothing when the phone is plugged in. I have tried on 3 computers using 3 different cables. When I plug the phone in, it charges fine, and I get a message on the lock screen saying "Unlock your device to use it as a media device", but unlocking it does nothing. I have rebooted the computers and the phone several times. I have enabled and disabled USB debugging and uninstalled all apps that I may have recently installed. Nothing seems to help. I am positive that this was working 2 weeks ago. The phone is from AT&T, recently upgraded to 4.3 stock, unrooted. Any help would be greatly appreciated.