Not entirely correct. With recent announced T-Mobile USA phones, i can see most of the t-mobile's phones support AT&T's 3G bands. LTE is different story. For some reason, i find T-Mobile's phones more attractive to me (Lumia 925 is one example) so i really want to know if the specs posted by Nokia USA are correct. Nokia USA shows that 925 will support this "WCDMA network: 900 MHz, 1700 - 2100 MHz, 2100 MHz, 1900 MHz, 850 MHz", so definitely unlocked t-mobile's usa should work on AT&T's 3G bands (AT&T uses 850 and 1900 on WMCDA/3G). Nokia USA also shows "LTE network bands3: 2, 4, 5, 17" for Lumia 925. AT&T uses band 4 and 17 for their LTE network, so 925 should get LTE on AT&T too. I'm tempted to purchase this phone, but t-mobile won't unlock it for me if do not spend 50$ in service and wait 60 days. I do not see any L925 unlockers on ebay either. This would be perfect phone for me on AT&T