Not sure if this is going to change , but here ' s the current verbiageNo trade in available ? Get a $ 10 bill credit for 20 monthsCustomers will receive a $ 10 bill credit for 20 months when they meet the following requirementsActivate a new line on TMobile ONE or a qualifying Simple Choice Unlimited with an unlimited data featurePortin a number form another carrier within 30 days of activationSubmit for the rebate on www . tmobile . compromotions using the code 16 BYOD within 30 days of activationCustomers who ' d like a new device purchased their EIP or FRP but don ' t want to trade in a device can also get a $ 10 bill credit for 20 months when they meet the above requirementsThis offer is not available in Costco .