While Nokia is still to bring the Nokia branded Windows Phones to the U.S. reports point towards the company working with AT&T to bring an LTE-capable version of the Nokia Lumia 800.This report seems a little contradictory, as we have heard that Nokia Windows Phones won't reach U.S. shores until early 2012. Also the current Windows Phone 7.5 Mango doesn't support LTE, so we will probably have to wait for the Windows Phone Tango update before LTE devices will be available.
The other bit of information which makes this sound like a rumor is the upcoming Nokia 900, which is said to be available through AT&T and may be the first Nokia Windows Phone in the U.S.
The Lumia 800 is available in black, cyan and magenta, and shares the ergonomic polycarbonate design of the Nokia N9. The Lumia 800 features a 3.7 inch display, 8MP camera, 16GB of storage and is powered by a 1.4 GHz processor.
source - The Verge