Conversation

As the

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. eff.org/deeplinks/2022 Unfortunately, this feature requires version 1.6 of the Radio HAL, and many devices don't have that.

112

Replying to

and

GrapheneOS has supported LTE only mode for years. It's something we consider an attack surface reduction feature. Avoiding 2G/3G doesn't make cellular networks secure/trustworthy. It's important to use authenticated encryption and avoid trusting networks.

grapheneos.org

GrapheneOS usage guide

Usage instructions for GrapheneOS, a security and privacy focused mobile OS with Android app compatibility.

Replying to

and

Most phones including the stock Pixel OS allow carriers to disable user configuration of the network mode and the new 2G toggle. GrapheneOS uses the stock Pixel OS APN / CarrierConfig databases as the input to generate ours but we strip the configuration disabling user control.

12:03 AM · Jan 14, 2022Twitter Web App

Replying to

and

LTE only mode option is quite usable now that VoLTE is very broadly deployed and supported. If you don't have VoLTE, you can't make/receive carrier-based calls. Carrier-based calls and texts should only ever be used as a last resort if you care about privacy/security regardless.