Swap active SIM cards between devices

Find out how to switch an active SIM card to another device.

QUICK ANSWER

What's a SIM card?

A SIM card is a microchip that inserts into a compatible mobile device. It identifies and connects you to the AT&T wireless network.

DEVICE SUPPORT

Fix SIM card issues

Learn how to troubleshoot SIM error messages, move contacts between SIM cards or devices, and activate a new SIM card.

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DETAILED STEPS

What to know before switching SIM cards

Make sure the SIM cards for both devices are the same size.

Explore our SIM card device tutorial.

Heads up:

Check if you already have a compatible data plan. If not, add one.
Want a replacement SIM card? Find out how to get one
Have an eSIM? It’s non-transferrable, so you’ll have to go to a store or call us to get a new one.
After you swap your SIM card, make sure you call us or go to a store to update your IMEI. Otherwise, some features like HD Voice or your voicemail may not work.
Find out how to transfer your info to a new device.

Swap out active SIM cards

Turn your device off.
Remove the old SIM card.
Insert the new one.
Turn your device on.

Want help inserting your SIM card? Go to our device tutorials and choose the option for your device.

If you have AT&T PREPAID

Follow these steps before you turn off your device.

Go to att.com/myprepaid.
Select My Device and then Update Device. Don't know your IMEI for this step?
Enter *#06# on your phone's keypad to get it.
Enter the SIM card number and then select Continue.

Need help finding your SIM card number? Check out this SIM card image

Get help with SIM card swap issues

iPhone doesn’t show AT&T in the status bar

Connect your device to iTunes^®. Still not working?
- Activate the SIM card in your device
- Restore your iPhone or iPad to factory settings
Go to att.com/updatedevice.
Enter the requested info and follow the prompts to update your account with your new SIM card and IMEI number.

Data services don’t work after swapping SIM card

If you're swapping a SIM card from a basic phone to a smartphone or tablet, we’ll add a compatible data plan when the device activates on our network. Or, call us to add it.
Can’t use data after swapping the SIM and confirming or adding a data plan? You may have to program the correct APN and MMS data settings.

Last updated: April 7, 2021