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The SIM card is your device's ticket to the T-Mobile network!

 

Install or replace a SIM card

 
What's a SIM or eSIM?
 

SIM stands for Subscriber Identity Module. The SIM card is a tiny chip that’s inserted into your phone. It’s tied to your phone number and identifies you, the subscriber, to the T-Mobile network. It can also store data like phone numbers and contact info. The T-Mobile SIM card contains three difference SIM sizes: standard, micro, and nano.

Some phones and devices have an eSIM (embedded SIM card) built right in, so there’s no need to install a SIM card. An eSIM is part of the device and can’t be removed. Some devices even offer dual SIM capability—one eSIM and one removable SIM—so you can have two phone numbers on one device (for example, a work number and a personal number).

 
I’m new to T-Mobile
 
  1. With the device off, open the SIM card tray and insert the SIM card. 
    • 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.
  3. To transfer data from your old device, see Set up a new T-Mobile phone.
  4. Contact us if you want to transfer an existing phone number to T-Mobile.
 
I upgraded or replaced a device
 
  1. With the device off, open the SIM card tray and insert the SIM card. 
    • If your device didn’t come with a SIM card, just move the SIM from your old device to your new one and you’re good to go, no additional steps required.
    • Here's a short video to guide you through the process.
  2. Activate the SIM card. For the best 5G experience, we don't recommend using your previous SIM card.
  3. Turn the device on. Your service should be working.
  4. To transfer data from your old device, see Set up a new T-Mobile phone.

Are you a T-Mobile Prepaid customer? You may need to activate your SIM.

 
I added a new person or device 
 
  1. With the device off, open the SIM card tray and insert the SIM card. 
    • 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.
  3. To transfer data from your old device, see Set up a new T-Mobile phone.
  4. Contact us if you want to transfer an existing phone number to T-Mobile.
 
I want to use my eSIM
 

Some phones and devices have an eSIM (embedded SIM card) built right in, so you don’t have to install a SIM card. If you have an eSIM-enabled device and would like to activate the eSIM, follow the steps to activate an eSIM below. You'll need to have a Wi-Fi connection so you can download your eSIM settings.

 
I'm a Sprint customer who received a T-Mobile SIM card
 

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

SIM card with Magenta sleeve

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


SIM card without Magenta sleeve

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

 

Change or activate a SIM card / eSIM

  1. Click here and log into your My T-Mobile account with your T-Mobile ID.
  2. If you have multiple lines, choose the line you're changing the SIM/eSIM on.
  3. Follow the steps to complete security verification.
  4. Choose if you're activating a physical SIM or eSIM.
  5. Follow the steps to enter you ICCID or EID number and complete the change.
    • If you're changing to an eSIM, make sure you're connected to Wi-Fi and download your eSIM settings.
    • If you want to activate an iPhone eSIM on a prepaid account, download the T-Mobile eSIM app.
    • If you have any issues, contact us or stop by a store. For your security, the account holder or an authorized user must make the request.

 

Buy a SIM card

T-Mobile SIM cards come with adapters, in case your device uses a nano, micro, or standard card.

 

Watch our demo video!


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