I'm freaking out. Normally, my iPhone 4 does weird things like shut off randomly at about 10%. Usually, however, I would plug it in and it would turn on. I've noticed these problems began to occur after the iOS update. Today, I was using my phone with no problem. I placed it down right next to me while I was using my computer. I went to use my phone and the screen was dimmed, even though I set the brightness up. Then, the brightness went up, but I tried to unlock my phone and the screen wasn't working. After, it just went black and shut off. I know a way to solve this problem is by doing a hard reset, but my lock button is stuck. I've never gotten it wet and haven't really ever dropped it. I really need this phone because I travel for school and need to be able to contact someone if something happens. Is there anything that I can possibly do? I'm losing my mind. Any help is appreciated. Thank you!