New iPhone 5s shut off unexpected and won't turn back on
I just received my new 5s. I activated it. Made a phone call. I was downloading my apps, and using them, when the phone shut off unexpected. I tried to turn the phone back on, the apple logo appeared, then it went to the waiting circle for a couple of minutes. After a couple of minutes the screen had a blue screen for a second, then it went back to the waiting circle, then it turned off. I've tried turning it on a couple of times with the same results. Help!
iPhone 5s