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SUPPORT
New to T-Mobile? Switching is easy Set up your device Using the app Sprint Migration Center All get started topics Ways to pay your bill All about your bill Line permissions Your T-Mobile ID Your PIN/Passcode All account resources topics T-Mobile network In-flight texting and Wi-Fi Wi-Fi Calling International roaming Mobile Without Borders All network & roaming topics Find the right plan Netflix on Us HotSpot plans Voicemail Use Mobile HotSpot All plans support topics Tutorials Troubleshooting Unlock your device Protect your device SIM card & eSIM All device assistance topics Get T-Mobile for Business Billing and payments Manage your account Orders and shopping Account Hub registration All business support topics

Get one of these messages? Select it to find out more! 

On this page:

Your free SIM replacement is waiting

Why did I get a message about changing my SIM?

  • T-Mobile has the largest and fastest 5G network and an LTE network that covers 99% of people in the U.S*.
  • Your current SIM card is not compatible with our network enhancements and must be replaced to avoid service interruptions.
  • Learn more about how our network is evolving.

What to do

Stop by a store, contact us, or contact T-Mobile Prepaid for a replacement SIM. For your security, the account holder or an authorized user must make the request. Get help activating or installing a SIM.

You'll also want to make sure your LTE/VoLTE settings are turned on and your software is up to date. Get steps!

Remember to update your LTE/VoLTE settings and software

  • We're transforming our network experience and your device's LTE/VoLTE settings and software may need to be updated. 
  • Learn more about how our network is evolving.
  • Enabling LTE/VoLTE and running the latest software version will help avoid any service interruptions.
  • It's easy! Just choose your device manufacturer and follow the steps.
  • If your device manufacturer isn't listed or the steps don't work, check out our Tutorials for steps specific to your device.
 

Apple

 
Steps for Apple software update or LTE/VoLTE settings
Setting Steps
LTE
  1. From the Home screen, choose Settings > Cellular or Cellular Data.
  2. If you have an iPhone with an eSIM, select the line you're making changes to.
  3. Select Cellular Data Options, then choose the Enable LTE toggle.
  4. If the toggles don't display, select Voice & Data or Data and choose LTE.
VoLTE
  1. From any Home screen, choose Settings > Cellular or Cellular Data > Cellular Data Options.
  2. If you have an iPhone with an eSIM, select the line you're making changes to.
  3. Select Enable LTE and choose Voice & Data. 
Software Update
  1. From the Home Screen, choose Settings > General > Software Update.
  2. If an update is available, select to download and install.
 

Samsung

 
Steps for Samsung software update or LTE/VoLTE settings
Setting Steps
LTE
  1. Open the Settings app and choose Mobile Networks. If it's not there, select Connections first.
  2. Select Network Mode and choose an option that says LTE.
VoLTE
  1. Open the Settings app and choose Connections > Mobile networks.
  2. Slide the VoLTE calls switch to the ON or OFF position.
  3. If it's not there open the Phone app, press the Menu icon with three dots, and check in Settings.
Software Update
  1. From the Home screen, choose Settings > Software update > Download and install.
  2. Select OK > Start. When the restart message appears, choose OK.
  3. Repeat these steps until the device shows you have the latest software version.
 

LG

 
Steps for LG software update or LTE/VoLTE settings
Setting Steps
LTE
  1. From your apps list, choose Settings > Network > Mobile networks.
  2. Select Network mode and choose an option that says LTE.
VoLTE
  1. From any home screen, select Phone.
  2. Choose Menu > Call settings.
  3. Select the VoLTE switch to turn it on or off.
Software Update
  1. From the Home screen, choose Settings > System > Update center.
  2. Select System update > Check for update.
  3. Follow the on-screen prompts to download and install the latest software update.
  4. Repeat these steps until the device shows you have the latest software version.
 

OnePlus

 
Steps for OnePlus software update or LTE/VoLTE settings
Setting Steps
LTE
  1. From the Home screen, swipe up, then choose Settings.
  2. Select Wi-Fi & internet > SIM & network > Preferred network type.
  3. Choose an option that says LTE.
VoLTE

VoLTE is always enabled when available
Software Update
  1. From the Home screen, swipe up, then choose Settings.
  2. Select System > System update > Check for update.
  3. Follow the onscreen prompts to update to the latest software.
  4. Repeat these steps until the device shows you have the latest software version.

Full Terms

*5G capable device required; coverage not available in some areas. Some uses may require certain plan or feature; check T-Mobile.com.  Fastest: Based on median, overall combined 5G speeds according to analysis by Ookla® of Speedtest Intelligence® data 5G download speeds for Q2 2023. Ookla trademarks used under license and reprinted with permission.

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