As millions have already learned, it’s easy to bring your unlocked device to T-Mobile. Most phones can work on our network but we suggest you check out these details before you start using your unlocked Android or Windows device.

BYOD compatibility

T-Mobile is unable to guarantee devices from other carriers or those without T-Mobile software will work on our network. For additional details, check out the Non-T-Mobile phone & software disclaimer. 

• T-Mobile isn't able to test Non-T-Mobile Devices’ call quality, performance, data speed, feature compatibility, or other functionalities. Experiences may vary depending on the original carrier settings.
• Contact the manufacturer with any questions or problems regarding the device functionality, operation, or performance.
• Check your warranty and contract with your current carrier to determine what conditions apply to unlocking the device.
• Coverage and access to our high speed 4G LTE network is not guaranteed and isn't available in some areas.
• Your device must support the frequencies used by T-Mobile.

Check eligibility

• A device must be unlocked to be compatible with the T-Mobile network. Check out Unlock your mobile wireless device if needed.
• T-Mobile can't provide an unlock code, contact the original carrier to request an unlock code.
• If your device isn't compatible after using these steps, you can trade in your current device and upgrade your device to a T-Mobile phone or tablet.

BYOD Check online

1. Go to T-Mobile's IMEI Compatibility checker​ webpage.
2. Enter your IMEI and select Check phone to determine the BYOD eligibility.
   • If the checker shows "No match found," verify the device supports T-Mobile frequencies​. Contact the manufacturer if your unsure of the device frequencies.
   • Determine if your device supports VoLTE and Extended Range LTE.

Start using your device

Need service?

1. Use the device's user guide to determine which T-Mobile SIM card you need to purchase, check out Buy a SIM card.
2. If you are not a T-Mobile customer and need help activating your phone or tablet, find a plan that is right for you.

Already have an account?

Internet and picture messaging settings need to be updated to work on the T-Mobile network.

1. Insert the activate SIM card, turn on the device, and open a web page.
2. Some devices may update automatically but if not, change your settings using the BYOD T-Mobile data & APN settings.
3. Contact the device manufacturer for further instructions if data and picture messaging are still not working.

Partially compatible devices

If your device is only partially compatible with T-Mobile's advanced network, we'll send you a message to let you know after you activate your SIM. While you can still use the device, you may not experience the full benefits of our network, including limited coverage and data speeds. Here's why that can happen:

Network compatibility

• Partially compatible devices may not support all the same network technologies and frequencies used on the T-Mobile network.
• This can result in reduced coverage and slower data speeds compared to fully compatible devices.
• To help improve coverage, we recommend setting up Wi-Fi calling.
• Network compatibility is built into device hardware; you must replace your device to take advantage of newer network technologies and frequencies.

Software updates

• If a manufacturer stops supporting a device, it will no longer receive software updates.
• Certain apps, like our T Life app that offers free benefits every Tuesday, may not be compatible with older software versions.