Originally Posted by dynamicrockstar469
It is from vodafone but if 4.5 isn't official on O2 you void your warranty
That is NOT true. An upgraded OS will not void your warranty. AT&T recommended to me at one time to upgrade to another carrier's OS. Your not messing with the hardware, so there's nothing for the warranty to be void. You can always downgrade if you want to. They can't tell if you've changed your OS.