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Thank you for being among the first to sign up for FirstNet!

Now that you have your new FirstNet SIM, you need to ACTIVATE IT and then INSTALL IT, so you can start taking advantage of ALL the benefits of FirstNet. Your experience will be more secure and you’ll get access to superior coverage, capacity and more features.


Just follow the EASY, step-by-step instructions below to ACTIVATE your SIM.

  1. Log on to FirstNet Online.
  2. Set the taskbar to I want to: Change device IMEI/SIM.
FirstNet Online
  1. Enter the wireless number. Click Go.
  2. Enter the SIM ID number from the SIM card shipped to you. Click Go.
  3. Read the warning about SIM changes. Click Continue.
  4. Select additional feature changes as desired.

NOTE: A First Priority™ Tier feature will be auto-selected for you. The existing Dynamic Traffic Management (DTM) feature will be auto-removed on the next step. Existing features that conflict with the new SIM, such as DTM or other selected features, will be detected and the user is warned that the incompatible feature(s) will be removed.

  1. Click Continue.
  2. FirstNet Online
  3. Verify your selected changes.
  4. Click Submit to save your changes.

INSTALL SIM: Not sure how to do this? You can visit your local AT&T store or use the online resources below.

iPhone devices: Watch this 30-second video

Other devices: Visit device support

  • Samsung devices:
    • Select your brand and device model
    • In the Learn more about your device section, select Device info
    • Select Insert SIM & Memory Card
  • Sonim devices:
    • Select your brand and device model
    • In the Learn more about your device section, select Device info
    • Select Phone Assembly
  • Other devices:
    • Select your brand and device model
    • View the User Manual

Now you can take advantage of the full benefits of having a FirstNet SIM, including;

  • A highly secure environment – dedicated core with available end-to-end encryption.
  • 99.99% service availability objective – a standard unmatched by any other large-scale LTE network.
  • First responders get First Priority®, which gives them priority access to the network and, when necessary, moves or drops commercial users to make room for first responders in times of network congestion.
  • No throttling of data speeds at any time in the U.S.
  • Robust identity, credentials, and access management.
  • Eligible for “uplift” to First Priority® through the Incident Management Portal.
  • Access to future enhancements; our 5-year roadmap includes Mission Critical Push-to-talk, Broadcast technology and z-Axis location-based services.
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