Firmware update - screen "freezing" ?

I have the LTE and was updated out of the box.

I posted this issue on the other thread. I wasn't really paying attention before and thought it was just me.

I'm still within the exchange it but I paid $30 to unlock it. :( So I guess I'll have to live with it and wait for an update.
 
My original "freezing" problem has gone away since I updated to 4.2.2. Now I just have poor(er) wifi connectivity for some reason...