If you're an existing T-Mobile customer upgrading to a new device, contact us to activate your new SIM card before following these steps.

1. With the device off, open the SIM card tray and insert the SIM card. 
   • For orders with multiple device, use the order confirmation email to see which SIM card goes in which device.
   • Here's a short video to guide you through the process.
     
2. Turn the device on. Your service should be working.
   • If you're bringing your own device from a different carrier or company and data isn't working, add T-Mobile's APN settings.
     
   • If you don't see bars of signal, check out No Service Troubleshooting.
3. To transfer data from your old device, see Set up a new T-Mobile phone.

The steps for activating your new SIM depend on which SIM card you got:

If you received a T-Mobile SIM in the Magenta packaging shown below, please follow the enclosed instructions or visit www.sprint.com/sim to activate.

If your SIM card didn't have a Magenta sleeve, choose which device type you're activating:

• New device and new SIM: Visit www.sprint.com/activate and follow the steps.
• Current device and new SIM: Visit www.sprint.com/simswap and follow the steps.

If you just signed up for T-Mobile Home Internet, the SIM card is already in your device and active! Check out T-Mobile Home Internet Support for information on device placement and setup.

If you've just replaced your Home Internet Gateway, You'll need to remove the SIM card from your old gateway and insert it into the replacement. Choose your device below:

• Arcadyan KVD21 Gateway
• Askey LTE Wi-Fi Gateway
• Nokia 5G21 Gateway

There’s a few ways to setup your eSIM:

• During the initial setup, you'll be prompted to activate an eSIM or transfer one from an existing iPhone.
• If you've already set up your iPhone and are connected to Wi-Fi, your iPhone will prompt you when the T-Mobile Cellular Plan is ready to be installed.
• Didn't get a prompt or chose to activate later? You can activate your eSIM from the device Settings > Cellular.
• To activate a new Prepaid account, check out the T-Mobile Prepaid eSIM app.

• During initial setup, you'll be prompted to activate an eSIM or transfer one from an existing device.
• If you've already set up your Samsung and are connected to Wi-Fi, choose Settings > Connections > SIM manager > Add eSIM to transfer the eSIM from another device.
• Our Tutorials have steps for supported devices, like the Samsung Galaxy S22.
• eSIM Quick Transfer not supported on T-Mobile For Business.

• Make sure you're connected to Wi-Fi and choose to Download your eSIM when you're setting up the device.
• If you’ve already completed setup, select Settings > Network & Internet, then choose the + icon to add a SIM. Select Download your SIM and follow the steps to activate your T-Mobile eSIM.

1. Contact us so we can activate your eSIM.
2. Connect to Wi-Fi and scan the QR code. Check in Settings > Network & Internet > Mobile Network for most Androids.
3. Our Tutorials have steps for supported devices, like the Motorola razr 5G.