GF never had a smartphone before so we got it at Radio Shack for $60 and it came with a free $10 store credit so it was only $50 for the phone. At first the phone would shut down by itself randomly 5 or 6 times a day, after looking on the internet I discovered the battery was not tight against the terminals and stuck a piece of paper under the battery to jack it up slightly and that solved that issue. And for about a month all was well in the world. Now the phone has started to become unstable and the screen goes black right in the middle of doing things, sometimes pressing the button will bring the screen back up and other times the phone will not respond to anything and will remain dead until its plugged into a charger and then the phone reboots and works again. This happens no matter what the charge level of the phone happens to be. I should have known $50 was too good to be true for a decent smartphone. anyone know if the OS can be upgraded or reloaded or reset back to where it will work normally again?