Sorry if this has already been posted but seeing so many mixed posts about this. I'm travelling to the US and considering buying the iPhone 6. I believe if I get the t mobile sim free phone this will work on all 4G bands in UK? I'm told that this sim free phone just has a t mobile sim in it but nothing to do with t mobile. Has anyone done this and successfully uses 4G in the UK? I'm on EE right now. I'm hoping it's the same device as sim free one in the UK but hopefully someone has already done this. Thanks in advance!