T-Mobile auto-migrates legacy plans to newer, sometimes pricier options

T-Mobile is automatically migrating thousands of customers on decade‑old legacy plans (including Simple Choice, T‑Mobile One, and some Sprint grandfathered plans) to its current lineup (Essentials, Experience More, Experience Beyond) over the next few billing cycles. The switch requires no action from customers; some will see no change, others a modest price adjustment, with the new rates typically lower than what new customers would pay. All moved customers retain their benefits and gain improved network features, and the move is described internally as a cleanup removing over 1,100 legacy billing codes.