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Android 12 quietly gets a useful security feature, but theres a big caveat – Android Central

by January 17, 2022

Android 12Source: Nick Sutrich / Android Central

While the best 5G networks in the U.S. including T-Mobile and Verizon Wireless continue to expand their coverage across the country, most smartphones still allow for interoperability with 4G/3G/2G networks. There are instances when your device tries to connect to available 2G networks, and the Electronic Frontier Foundation notes this poses a security risk.

Fortunately, Google added the ability to disable 2G modems on Android phones, though this may have gone unnoticed by everyone. The 2G kill switch, according to the EFF, is a useful feature that should protect devices from “invasive police surveillance technology” known as cell site simulators.

For the uninitiated, these simulators are used to impersonate an actual 2G tower in order to intercept communications, owing to the lack of authentication from towers to devices. There’s also a lack of strong encryption between 2G towers and devices, which could allow attackers to crack that connection in real time to intercept calls and text messages.

This does not appear to be a problem, as most modern smartphones now connect to 4G signals. Cell site simulators, on the other hand, can downgrade your connection from 4G to 2G when the former is unavailable in a specific area. Switching off 2G at the modem level is required to keep your data secure.

But there’s a catch. The EFF says the feature is only available on newer devices “due to limitations of old hardware.” Mishaal Rahman also noted that you’ll need to update your device to the Radio HAL version 1.6 to access the kill switch. However, most devices that are being upgraded from Android 11 don’t support the latest Radio HAL due to Google Requirements Freeze, per XDA Developers.

As the @EFF points out, Android 12 adds a toggle to disable the 2G modem. 2G is insecure and vulnerable to interception, so you’re advised to avoid it.https://t.co/26YFMVtTHt

Unfortunately, this feature requires version 1.6 of the Radio HAL, and many devices don’t have that. pic.twitter.com/oxyOFkyiVA

— Mishaal Rahman (@MishaalRahman) January 13, 2022

That said, this should not bother owners of devices running Android 12 out of the box. If you have a Google Pixel 6, for example, you can turn off 2G by navigating to Settings > Network and internet > SIMs > Allow 2G. From there, you can deactivate the option.

Have you listened to this week’s Android Central Podcast?

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Garmin Venu 2 Plus review: More tempting (and expensive) than everGarmin Venu 2 Plus review: More tempting (and expensive) than ever

Garmin 2.0


Garmin Venu 2 Plus review: More tempting (and expensive) than ever

Last year, we called the Garmin Venu 2 a fantastic device that cost far too much for what it offered. Now, Garmin has released a new version with mostly the same specs but some small upgrades for $50 more. Despite that, the Venu 2 Plus may be worth the cost for you!

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