With the N900 already delayed why not make changes to support WCDMA on 850 and or 1900 mhz? I would understand the marketing decision to only support 3G on T-Mobile frequencies if T-Mobile was supporting the phone. By not having WCDMA on 850 or 1900 the vast majority of the US land area will not have 3G coverage on the N900. If you really want this phone to succeed in the US I feel that you need to support AT&T's network.