T-Mobile will be the first operator in the U.S. to sell a Nokia Windows Phone model, when the Lumia 710 goes on sale on Wednesday. The phone is geared to first-time smartphone buyers and will cost just $50 after rebates. U.S. phone fans have been waiting for the Lumia 800, a higher-end Nokia Windows Phone that's been available in other parts of the world for a few months. So far, no U.S. operator has announced plans to sell that model.
Earlier on Monday, Ballmer made a surprise appearance at the AT&T Developer Summit and announced that HTC and Nokia would make the first LTE Windows Phones.