I have a funny story about a Q bricking.
Had it for a couple weeks, didn't do much of anything... nothing to directly cause it.
I took it to the Sprint store and the tech asked if I charged it with a non moto q usb cable. I had, so I told him yes. He told me that was what caused it and if it happened again, they wouldn't replace it. Heh.
That was my first Q.
2nd had random button pushing going on.
3rd had a dead headset speaker thingy.
4th had 0 bars of reception everywhere.
I moved on after that...