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Activate and use your device

Learn how to get your device up and running on our network. It can be one you bought from us or a compatible and unlocked device you already own.


Set up and activate your device’s SIM card or eSIM

Activate your SIM card online
Make sure there’s a SIM card in your device before you try to sign it up on our network. It’s best to use the SIM card that came with your new device or order a new one.
  1. Go to activate your device.
  2. Select the option for AT&T WIRELESS or AT&T PREPAIDSM.
  3. Enter the requested info and select Continue.
  4. Follow the prompts to finish.
If you have AT&T PREPAID and don’t want to activate online, call us at 800.901.9878.

Activate an eSIM if you have a dual-SIM device
Heads up: If you’re bringing a dual-SIM device to AT&T, an eSIM won’t transfer.

Have an AT&T PREPAID plan? Contact us to activate your eSIM.

For AT&T WIRELESS, make sure the eSIM is on an active wireless plan, then download it over Wi-Fi®.
  1. Go to your phone settings.
  2. Tap one of the following (what you see depends on the device):
    • AT&T Cellular Plan Ready to be Installed, then Continue
    • Cellular, then Add a Plan
Have a QR code printed on an AT&T eSIM card? Follow these steps.

Transfer your phone’s info

It’s a snap to transfer your contacts, photos, and videos to your new phone.
Quick answer

Can I set up a phone or data device if I didn’t buy it from AT&T?

How do I know if my new device or SIM card works on the AT&T network?

How do I activate an eSIM for my iPhone XS and newer models?