Today my phone suddenly stopped working today, at first it would restart when the lock button was touched. This happened once today, so I turned it back on and it stayed on for about 5-10 minutes before shutting off completely. I've taken out the battery multiple times, and I've gotten it to boot up to the "Samsung Galaxy SIII" screen before it goes black. I researched my problem and learned that I could possibly solve it by factory resetting or putting my phone into download mode. But if I get either to load, the factory reset screen does not show up, and when put into download mode, the screen goes black after it reaches the "Downloading..." screen. Is there anything I can do or am I just going to have to give in and get a new phone?