Phone is only 1 month old and there is no physical damage (never been dropped and I have a protective case for it). It recently started freezing when I came in from outside and wouldn't work for a few minutes. I thought it was maybe just the cold but the temperature hasn't been that bad here. It looked like the backlight was coming on so I could tell the buttons were working but nothing came up on the touchscreen except a slightly lighter shade of black. Today it's gotten worse so that it doesn't respond at all to touching the home button except after maybe a minute of repeated pressing. I've done a factory reset and that did not help at all. Any ideas?