Default Freezing?

I got my Z2 a few weeks ago and notice it freezes up a lot. This happens mostly when I'm playing a video or especially when I use the camera launch button. It will freeze and I can't do anything. Also I'm getting a good number of fc on different apps. I'm on stock and have made no modifications. I'm in Canada so still on the .55 firmware and cannot update. I'm not sure what to do, should I try to return it or wipe and reset or what?

Sent From My Xperia Z2 On Bell.
NOTHING LIKE A NEXUS!