Its not exactly clear if it means anything, but the Nokia Lumia 800 has passes through the FCC with AT&T 3G bands.
There are no AWS bands, so we certainly know the handset is not heading to T-Mobile USA, but as far as we know AT&T is expecting a somewhat more powerful device with LTE, which this handset certainly is not.
Either way, a lot should become clearer in a few weeks at CES.
Via Engadget.com