For step-by-step installation instructions, visit our device help page. If you are an existing T-Mobile customer bringing your own device and just need to change the size of your SIM card, please visit a T-Mobile store.
Before you make a payment or change your plan, be sure to have your PIN and phone number we assigned you. We will send you a text with your phone number, or you can dial #NUM# from your phone to retrieve your number. Your PIN is the first four digits of your ten-digit phone number.
You can add service to your starter Pay As You Go plan in one of several ways:
If you would like to port in an existing number, call 1-877-778-2106 (Remember: Do not cancel your wireless account until your T-Mobile account has been activated.)