The SIM card is your device's ticket to the T-Mobile network! Learn how to buy one, install or replace it, and change or activate a SIM card/eSIM.

If you’re wondering how they’re different than physical SIM cards, why you might need them, which devices have them, and how to use them, we’re here to help answer those questions.

Get a T-Mobile SIM card & plan. Once you get your SIM card, pick the plan you want, and your phone will be connected to our network.

Discover the latest T-Mobile prepaid phone plans, with unlimited talk and text, high-speed data on our 5G network. Learn more now!

Discover T-Mobile's prepaid SIM card for unlocked, compatible devices to enjoy unlimited plans without activation hassle. Includes Nano SIM with adapters.

If you purchased your device from T-Mobile or if you have a T-Mobile authorized device, please follow the steps outlined below to determine your eligibility for device unlocking.

If it's asking for a PIN, try the default SIM PINs of '1234' or '5678'. If you get a prompt about a PUK code or your SIM is locked, Contact Us to request your PUK code. If you're prompted to enter the PUK …

Congratulations on your new purchase. Follow these steps to set up your new device, including transferring data and the SIM card from the old one.

On your computer or device, go to prepaid.t-mobile.com and click the banner to activate service with eSIM. Follow the steps to check for device compatibility by selecting which make and model of …

If you've unlocked a T-Mobile device but can't get signal with another carrier, contact the other wireless provider for assistance. If you're bringing an unlocked device to T-Mobile, check out our compatibility …