T-Mobile's US division took a minor blow on Thursday with word of muted results for its just-finished spring quarter. The cell carrier's growth slowed to add just 325,000 total customers, less than half the gains of 668,000 a year ago. Its churn rate, or the number of old customers replaced with new ones, also climbed from 1.9 percent in spring 2008 to 2.2 percent today. Most of the shortfall i
