T-Mobile today reported results that showed a major swing towards smartphones. The company lost 93,000 customers as a whole but more than tripled the number of smartphones on its network in the past year from just 2.1 million last spring to 6.5 million a year later. Many of these were using Android phones like the myTouch 3G Slide, but the success of the HD2 and core devices like the BlackBerry Bold 9700 also played a part.