Have a new 5s - quite happy with it overall until a few days ago. While in a few different applications the phone either freezes or reboots to the black background/white Apple as if I powered it off and restarted it. It has happened with Good Mobile Messaging, Action Movie and a few others. Yesterday while using Action Movie I had to Hard Reset the device SEVERAL times = home key and power key pressed simultaneously and finally stopped using that app as I understand hard resets are not good for the phone. I can stop using that app altogether, but right now I HAVE to use Good because that is my work email/calendar, etc by default. Not sure if it has to do with iOS, faulty hardware, etc. would tend to doubt it was a specific application becuase it happens with a few different apps - any help would be greatly appreciated