To ensure your reimbursement doesn't get denied, keep these rules in mind:

T-Mobile currently offers two primary ways to escape your old carrier. Both provide (for up to 4 lines) via a virtual prepaid Mastercard.

: You must submit a PDF or screenshot of your final bill from your old carrier. This must clearly show your phone number, device model, and the remaining balance.

Switching to T-Mobile: Will They Really Pay Off Your Contract in 2026?

Standard monthly service charges or taxes on your final bill. Past due balances or late fees from your previous carrier. Costs exceeding the $800-per-line cap. Summary Table: Switcher Options