The End of 2G and 3G: Is Your Old Tech Obsolete?

If you have noticed that your older car’s remote start feature has stopped working or your vintage Kindle cannot download new books away from home, you are likely a victim of the “network sunset.” Major wireless carriers have officially shut down their 2G and 3G networks to free up bandwidth for faster 4G LTE and 5G technologies. While most people have already upgraded their smartphones, this shift has silently disconnected millions of other devices, including home alarms, medical alert systems, and vehicle SOS buttons.

The Shutdown Timeline: Who Turned Off What?

The major US carriers have completed the bulk of their network shutdowns. If you have a device that relies exclusively on these older frequencies, it has likely already lost service. Here is the breakdown of the major shutdown dates:

  • AT&T: Shut down its 3G network on February 22, 2022. (AT&T shut down its 2G network back in 2017).
  • Verizon: Officially decommissioned its 3G CDMA network on December 31, 2022. This was the final major deadline that affected many legacy devices.
  • T-Mobile: Shut down its 3G UMTS network on July 1, 2022. T-Mobile was the last holdout for its 2G GSM network, which was used mostly for machine-to-machine (IoT) devices, but that service has also reached its end of life as of September 2024.

This means there are no major cellular carriers in the United States currently supporting 2G or 3G signals.

Why Your Home Alarm Might Be at Risk

The most critical safety risk involves home security systems. For decades, companies like ADT, SimpliSafe, and Vivint installed systems with a cellular backup. This ensured that if a burglar cut your phone line or Wi-Fi, the alarm could still dial the police center using a cell signal.

Millions of these systems installed between 2000 and 2019 relied on 3G radios. Now that the towers are down, that backup connection is severed.

What you need to do:

  • Check your installation date: If your system was installed before 2019 and you have not had a technician visit recently, you are likely affected.
  • Test your system: Put your system in “test mode” (call your monitoring center first) and trigger a sensor to see if the signal goes through without Wi-Fi.
  • Request an LTE upgrade: Most providers, including ADT and SimpliSafe, have been offering “Cellular Communicator” replacement modules. These replace the old 3G chip with a 4G/LTE chip. Some companies offer this for free, while others charge a hardware fee ranging from $50 to $200.

The Impact on Connected Cars and SOS Buttons

The automotive industry was hit hard by the sunset. Automakers build cars to last 15 years or more, but the tech inside them ages much faster. Many vehicles manufactured between 2010 and 2021 utilized 3G modems for features like:

  • Remote start and unlocking via smartphone apps.
  • In-car Wi-Fi hotspots.
  • Automatic crash response (SOS buttons like OnStar).
  • GPS traffic updates.

Specific Examples of Affected Vehicles:

  • Honda & Acura: Many models from 2018 to 2022 lost access to HondaLink services in February 2022. Honda offered an Over-the-Air (OTA) update for some newer models to switch to a different network, but older models lost the features permanently.
  • Toyota & Lexus: Owners of vehicles equipped with “Lexus Enform” or “Toyota Safety Connect” made between 2010 and 2018 saw these services terminate on October 31, 2022. This includes the SOS safety button.
  • Nissan: The 3G shutdown affected NissanConnect services on models like the Altima and Rogue produced prior to mid-2021.
  • Tesla: Even Tesla was not immune. Model S vehicles built before June 2015 required a $200 modem retrofit to maintain connectivity.

If your car is affected, the vehicle will still drive perfectly fine. However, the emergency buttons and app connectivity are permanently disabled. Some third-party companies, like Mojio, offer OBD-II dongles that plug into your car’s diagnostic port to restore some “smart” features via 4G, but the factory-integrated buttons will remain dead.

E-Readers: The Kindle Situation

Amazon’s Kindle e-readers were famous for “Whispernet,” a service that allowed users to download books anywhere using a free 3G connection included in the device price.

With 3G gone, older Kindles have limited functionality:

  • Kindle (1st & 2nd Gen) and Kindle DX: These devices do not have Wi-Fi. They relied 100% on cellular data. They can no longer access the Kindle Store or download books wirelessly. To put new books on them, you must download the file to a computer and transfer it to the Kindle via a USB cable.
  • Kindle Keyboard (3rd Gen): This model has Wi-Fi. While the 3G no longer works, you can still connect to your home Wi-Fi network to download books.
  • Newer Models (Paperwhite, Oasis): Most modern Kindles rely on 4G or Wi-Fi, so they are unaffected.

Medical Alert Devices (PERS)

Personal Emergency Response Systems (PERS)—the “I’ve fallen and I can’t get up” buttons—are perhaps the most dangerous casualty of the shutdown. Older pendants operate almost exclusively on 2G or 3G networks.

If you care for an elderly relative using a device from Life Alert, MobileHelp, or Medical Guardian that is more than three years old, it is vital to test it immediately. If the device attempts to dial out using a defunct network, the call will fail. Most reputable companies have already reached out to customers to swap these devices, but if a device was purchased second-hand or sitting in a drawer, it may be useless.

Frequently Asked Questions

Does the 3G shutdown affect 4G LTE phones? No. 4G LTE is the current standard for voice and data and will be supported for at least another decade. If your phone has VoLTE (Voice over LTE) capabilities, which almost all phones made after 2015 do, you are safe.

Can I fix my car’s 3G connection with a software update? In most cases, no. The issue is hardware-based. The physical modem inside the car is designed for frequencies that no longer exist. Unless the manufacturer offers a physical hardware retrofit (like Tesla did), the feature is gone forever.

Will my old flip phone still work for 911 calls? This is a common misconception. FCC rules previously required inactive phones to be able to dial 911. However, a phone cannot dial 911 if it cannot find a compatible signal. If your old flip phone only speaks 3G and there are no 3G towers, it cannot call 911. It is effectively a brick.

What should I do with my obsolete devices? Do not throw them in the trash. They contain lithium-ion batteries and other hazardous materials. Take them to an electronics recycling center like Best Buy or Staples, or check if the manufacturer offers a trade-in program for a newer, 4G/5G compatible model.