Funny, my friend said exactly the samething and that's what EE are doing.
He has switched off his mobile data now incase he gets a unexpected high bill.
I'm going to go slightly OT now for a minute - Apple themselves are up to the same trick with the 2011 15" MacBook Pro. There are at tens of thousands (at minimum) that have AMD GPU failure, usually multiple times. Apple keep denying publicly there's a problem, and store staff can't admit to it. Mention consumer protection in a country so equipped and they crumble without a fight cover the cost of repair on out of warranty kit.