Hi,
The same thing happened to me.
Although I also rooted the phone.
So I am not sure what the cause of the issue was.
Although youtube and games were working when I first got the phone.
I have since sent the phone back for repair / replacement.
I was able to revert the phone back to the stock flash, but it was still in an unlocked state.
I wonder if it will effect me in trying to get the handset replaced.
If having the charger connected while installing an update causes a problem, perhaps they should prevent update if a charger is connected.
Makes sense to me, although hmmmmm may not make sense to the developers.