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The T-Mobile Prepaid eSIM app lets you activate new T-Mobile prepaid service on an iPhone with eSIM. For other devices, activate on

About the app

The Prepaid eSIM app was built for travelers coming to the U.S., existing T-Mobile customers who want a secondary pre-paid line, and anyone who wants to take the Un-carrier out for a test drive to try out America’s fastest 5G network.*

  • The app can only activate a T-Mobile prepaid line.
  • For postpaid accounts, check out T-Mobile eSIM.
  • Only available for Apple iPhone XS or newer running iOS 12.1.1 or later.
  • The app requires:
    • You have a data connection, through either Wi-Fi or Cellular.
    • You either purchased the iPhone from T-Mobile, or else you must first SIM unlock it. (Contact the original provider if you need help.)
  • There are no fees to activate an iPhone with an eSIM.
  • New activations may be completed outside of the US, but the device must register on the T-Mobile network to begin using service.
  • To activate your iPhone eSIM on another wireless provider or manage eSIM settings, check out our Tutorials.


Activate T-Mobile service

Simulators are available to show these steps!

  1. Download and install T-Mobile Prepaid eSIM app from the Apple App Store.
  2. Open the app and review the welcome screen.
  3. Select Get Started.
  4. Enter your email address and select Next. (If you already have T-Mobile, you'll need to use a different email address that's not used with a T-Mobile ID.)
  5. If prompted, choose Settings and enable Location Services for the app. Set it to While using the App.
  6. Enter the address for the primary place you'll use T-Mobile service, usually your home, and select Next.
  7. Make sure your address is correct on the pop-up, then select Confirm.
  8. Choose your prepaid plan, then select Next. (Choose See plan details for more information on the plans.)
  9. Review the Service terms, then select Accept if you agree.
  10. Enter your credit card information (including the CVC/CCC and billing zip code), then select Next.
  11. Review your order to make sure everything looks correct.
  12. Enter a new 6-15 digit PIN, confirm it, and select Submit.
  13. Wait while we set up your T-Mobile service.
  14. On the "Install Cellular Plan" screen, choose Continue to download and install your eSIM profile.
  15. select Add Cellular Plan.
  16. Label your cellular plans for easy identification and select Continue.
  17. Choose which line you want to use as your primary line, then select Continue.
  18. Once that's complete, the screen shows your new phone number and lets you view your receipt.
  19. If you want to use a phone number from another provider or from another line, contact us to get this started.

For more instructions on how to set up and use your eSIM line after the activation has completed, please visit


Re-download eSIM after replacing device or master reset

Sometimes, you may need to replace the eSIM you received through the app.

  • You accidentally deleted your eSIM.
  • You upgraded your phone and want to transfer your eSIM line of service to your new phone.
  • You lost connection when downloading your eSIM, and it didn't get installed properly on your device.


To start, you'll need to call us at 1-877-778-2106 to get a QR code. Make sure you have:

  • Your Prepaid eSIM phone number or your OrderID. Your OrderID will display if you encounter an error in the app.
  • Your account PIN code, which you set up to complete your order in the T-Mobile Prepaid eSIM App.


Errors and support

Here are some error messages you may receive using the app and tips to solve them.

Oops, you lost connection
  • This means the app lost its connection to the internet when trying to set up service.
  • Make sure you have good Wi-Fi or Cellular signal, then try again.
  • If possible, try again using a different Wi-Fi network.
Oops, your receipt isn’t ready yet
  • This means that your receipt hasn't finished loading yet. It could take a minute.
  • You can also view the receipt on My T-Mobile under your account history.
Error 501: Device is incompatible or locked by your provider
  • This means your iPhone doesn't have an eSIM or is locked to the service provider you purchased it from.
  • Make sure you have the Apple iPhone Xs or newer.
  • Contact the service provider who sold you the device to request an unlock.
Error 502: That email is already a T-Mobile account
  • This means the email address you're trying to use is already set up with an existing T-Mobile account.
  • Try again with a different email address to create a new account.
Error 503: eSIM limit reached on this device
Error 504: Oops, something went wrong
  • This means that the app had an issue loading the next screen.
  • Make sure you have a strong Wi-Fi or Cellular data connection, then try again.
  • If it's still not working, contact us for help.
Error 505: There was an issue completing your order
  • This means that something other than the issues above is causing problems.
  • Make sure you have a strong Wi-Fi or Cellular data connection, then try again.
  • If it's still not working, contact us for additional support.
Error 506: It looks like your ZIP code has no remaining phone numbers



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