ok so recently I decided that it was time to update my iPhone 5c to iOS 8.3. I think it gives you like a new music app and streaming or something. Anyways my phone has been acting strange and told me I was robot when it tried to use safari and wouldn't let me send texts without wifi. Even on wifi it was tough. So I thought updating it would fix the problem, big mistake. Imeddietly after the update installed my I phone shut down. That's the problem. For then next 4 hours that day my iPhone repeatedly shut down over and over and over again. It shuts down for like 30 sec then comes back to my home screen. 5 sec later it turns off. I've tried rebooting, holding the home button and top button but it doesn't work. I'm guessing that it's restarted like 150 times if not more. And about half the time the screen turns different colors like red, blue, black, or green or lines appear across it. I haven't done much to fix it because I can't unlock my phone in time before it runs off by itself. I've heard turning off and on cellular data fixes it but I can't even get into settings quick enough. I've never seen anything like this happen and haven't seen any help on the Internet.