This week T-Mobile introduced the "JUMP" trade in plan. The plan allows T-Mobile subscribers to pay US$10 a month for a minimum of six months. After the six months, subscribers may trade in their existing phone for a new one at the same or lower price as offered to new customers. T-Mobile "JUMP" subscribers will be able to trade in their old equipment twice a year, including iPhones.
As for how iPhone sales are going at T-Mobile, AllThingsD caught up with CEO John Legere in New York this week. Here's what th
