Hi guys, I'm having a strange problem with my iPhone 4. It will shut down every now and then, randomly, for no apparent reason. The only way to turn it back on is to hold down the power button until the Apple logo appears, then wait while it re-boots itself. It often happens when I attempt to take a picture or video, but also happens at totally random times. The odd thing is that when it starts to happen, it happens a lot -- over and over again, multiple times. It's very annoying. But then it suddenly will work for a day or two or three without incident -- until it starts up again. Anyone ever see anything like this before? Any ideas on what might be wrong?? EDIT: I forgot to mention that the problem seemed to start around the time I updated to iOS 7, but I can't be certain about that. Also, I've never done a jailbreak on my phone, so that's not the problem! Thanks!