Hey guys, Visiting Los Angeles in early Dec from the UK. Decided to get the X after seeing it in person yday. I've preordered it on Apple.com and getting it delivered to my friend I'm staying with. My delivery date is Dec 1-8 which is perfect as I get there on the 7th. I had to order the T-mobile version as the other carrier options require account info. I know the TM version works in the UK as it's GSM. When I land on the 7th, can I take the X into the nearest Apple store and change it for the Verizon model without providing any account details? Just a straight swap? I travel abroad quite a bit so may need to be on a CDMA network from time to time. + If so, Do I activate the Verizon model with a verizon sim (to unlock it?) before sticking my UK sim in or can I just put the UK sim straight in as it may already be fully unlocked and open to any sim? Although atm I'm hoping Apple sticks a SimFree option up in the next few weeks so I can just get that.