According to T-Mobiles website customers must sign up for their Even More Unlimited Talk + Unlimited Text + Unlimited Data for $79.99/mo. After that you choose your 4G device proceed to check out. At check out customers are required to select transfer phone number and then continue with checkout.
Once you have finished getting your new service with T-Mobile you can then head over to T-Mobile’s Rebate page and enter the promotional code SWITCH2TMO. Once you have done that you are on your way to receive your $125 prepaid debit card.
Now to receive your card you must have your service current through out the processing of the card which can take several weeks, but hey you didn’t sign up just for the money now did ya?