I've done about 5 hard resets (Settings | About | Reset Phone). All is fine until you restart your phone, then it goes into the endless reboot every 30 seconds. So i guess the joke is on me trying out preview software which has now rendered my phone useless.
Hey Guys,
If you haven't found it yet, there's a cool Battlefield 4 Stats app for windows. There are 3 apps, but this one is free and better than the paid for ones.
Battlefield 4 Stats | Windows Phone Apps+Games Store (United States)