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Advisory: AT&T 3G Shutdown in February 2022



What do I need to know?

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AT&T will shut down its 3G network(link takes you to an external page) in the United States on February 22, 2022. If your Super SIM-enabled devices depend on 3G connectivity, they will no longer be able to connect to AT&T after this shutdown. You may be impacted even if your device supports 4G LTE.


My devices don't support LTE or LTE-M

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If your devices depend on legacy 2G and 3G networks, you will lose access to AT&T's network.

  • You may be able to use T-Mobile's 2G and 3G networks if you're within coverage. However, T-Mobile also intends to shut down its legacy 2G and 3G networks(link takes you to an external page) in the near future.
  • You should plan to retire or replace your devices that depend on 2G/3G networks in the United States with 4G LTE-enabled devices.

My devices do support LTE or LTE-M

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If your devices support LTE but are configured as voice-centric, they may be unable to connect to AT&T's network as AT&T delivers circuit-switched (CS) voice via the 3G network.

For devices deployed in the United States, Twilio recommends that you enable both T-Mobile and AT&T on your Network Access Profiles to give your Super SIMs multiple network connectivity. Check your Network Access Profiles and enable T-Mobile and AT&T unless you have specific commercial or technical factors that prevent this.

If AT&T and T-Mobile are already enabled on your Network Access Profiles, you may not need to make any changes.

If you experience connectivity issues with AT&T, especially if your devices only supports 2G/3G, you may be able to resolve the issue by either:

  • Blocking AT&T in your Network Access Profile.
  • Moving impacted devices to a different Fleet that uses a different Network Access Profile with AT&T disabled.

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