It trails first-place Verizon , then AT & T and Sprint . New T - Mobile plans let customers upgrade to a new phone up to twice yearly . The upgrade program , called Plus ! , will cost $ 10 per month . In March , T - Mobile started offering some plans with no upgrade . It 's all part of a push by T - Mobile to move out of fourth place among U.S. carriers .
New T - Mobile plans let customers upgrade to a new phone up to twice yearly . The upgrade program , called Plus ! , will cost $ 10 per month . In March , T - Mobile started offering some plans with no upgrade . It 's all part of a push by T - Mobile to move out of fourth place among U.S. carriers .