Stay connected on our network

Hit a snag activating a SIM card on our network? We can help.

Get a new SIM card

We’re upgrading our network to bring you more security and reliability. These upgrades mean that your phone and SIM card won’t work since we shut down our 3G network.

To stay connected to our network, you’ll have to replace your SIM card.

AT&T Wireless

Call us at 800.331.0500 or find a store near you. To protect or your account, only the account owner or retail authorized user can order and activate a new SIM card.

AT&T PrepaidSM

Pick up a SIM card from one of our stores or from an AT&T national retailer like Walmart, Best Buy, or Target.

Tip: If you're going to a national retailer, call first to make sure the SIM card kit is in stock.

Replace your old SIM

Not sure if your device will continue to work on our network? Check device compatibility (PDF, 209KB)

AT&T Wireless devices

To replace your old SIM:

  1. Turn your device off.
  2. Remove the old SIM card.
  3. Insert the new one.
  4. Turn your device on.
  5. Discard the old SIM card.

Need help learning how to insert a new SIM card? Go to our device tutorials, select Insert SIM & memory card, and choose the option for your device.

AT&T PREPAID devices

Before you turn off your device, there are a few steps to follow.

  1. Go to
  2. Select My Device and then Update Device. If you don't know your device IMEI, enter *#06# on your phone's keypad to get it.
  3. Enter the SIM card number and then select Continue.
  4. Discard your old SIM card.

Activate your new SIM card

Learn how to activate new SIM card.
Last updated: August 10, 2023

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