Update your SIM card

Learn how to update your SIM card online. You may need to update your SIM card if:


  • You've purchased a new phone, tablet, or internet device that uses a different type of SIM card.
  • You're replacing a lost, stolen, or damaged SIM card.
  • You've replaced your SIM card to unlock new features, such as Wi-Fi Calling.




To update your SIM card, follow these steps:


  1. Back up any contacts you saved to the SIM card, using Gmail, iCloud, Microsoft account, an SD card, or other options. This varies by device.
  2. Check the type of SIM card your phone needs. See SIM card types.
  3. Make sure you have the SIM card type your phone needs. If you don't have the correct type, you'll need to purchase a SIM card.
  4. Find the new SIM card number. It begins with 8901.
    T-Mobile SIM Card Number
  5. Go to http://www.t-mobile.com/SIM.
  6. Log in using your mobile number and My T-Mobile password.
  7. Follow the steps on the page.
    Note: It may up to 2 hours for your new SIM card to work.
  8. Insert the new SIM card into your phone. If you need steps, you can find them in Phones, Tablets, & Devices.