iphone 5 UK compatibility in US

[ajc123]

I'm sure this gets asked a lot, but I couldn't find an answer. I have a UK iphone 5 (A1429) and I'm currently in the US and trying to figure out which network (if any) it will work on for LTE.

Looking here (http://www.apple.com/iphone/LTE/) it seems like I have no chance, however when I look on the AT&T website (http://www.att.com/esupport/article.jsp?sid=KB113269&cv=820#fbid=7oVMIUitacC) it suggests that I need a device which works on 700/850/1900MHz bands, and the apple website says that my device does in fact work on 850MHz.

So, I'm not sure which to believe (and I'm pretty sure I've roamed over here on AT&T and got a 4G signal).

Anyway, can someone shed some light on this?

 

[ajc123]

Hmm, now I'm more confused. Looking at the t-mobile requirements (http://support.t-mobile.com/docs/DOC-4988) LTE is on 1700/2100, and the iphone specs show it works on 2100 - so I'm not sure why the specs don't show that the phone works on T-mobile?!

Maybe I'm reading too much into this, but I notice that sim only plans aren't as cheap over here as they are in the UK, so didn't want to buy one to find out that it doesn't work!