Sony Ericsson Xperia X10 Launches at AT&T

Sony Ericsson X10 on T-Mobile has been introduced with new look, look away now or you'll be sorely disappointed. Phandroid noticed that the American version of the X10 won't support the necessary frequencies to connect to T-Mobile's network.
Even though the specs page lists support for UMTS/HSPA 800/850/900/1700/1900/2100, Sony Ericsson is going to be localizing the radios.

It has been in the news that UMTS HSPA 800/850/1900 only available for phones sold in Americas (except Brazil) and Australia. UMTS HSPA 900/1700 not available for phones sold in Americas. UMTS HSPA 1900/2100 available worldwide.

So that means you'll still be able to find an X10 that works on T-Mobile, just not in this country. You'll still be able to import if you want to use your expensive handset with T-Mo's cheap Even More Plus plans.

This also doesn't mean that the X10 is definitely coming to AT&T. Sony Ericsson wants to have a carrier relationship, but it depends on if one works out. As it stands, if anyone will be subsidizing that huge $880 cost, it'll be AT&T.