T-Mobile USA (TMUS -0.1%) announces its rumored Jump upgrade plan. For $10/month, customers can...

|About: T-Mobile US, Inc. (TMUS)|By:, SA News Editor

T-Mobile USA (TMUS -0.1%) announces its rumored Jump upgrade plan. For $10/month, customers can trade in their phones twice a year, for the same price paid by new customers (in tandem with installment plans) or less. The #4 U.S. carrier is also launching a family plan for the ~1/3 of U.S. customers whose credit isn't strong enough for a regular postpaid plan, and (as expected) announcing it's selling Sony's (SNE) Xperia Z and Nokia's (NOK) Lumia 925. Also: CEO John Legere tries to counter the view the iPhone is solely responsible for T-Mobile's recent postpaid strength. He claims the iPhone (AAPL) made up 39% of April smartphone sales, but only 29% of May sales, and that May was the stronger month for the carrier. (live blog)