Uploaded March 2025 | Updated September 2026, 1 week ago

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Could your phone be secretly tracked by fake cell towers? Meet Rayhunter, a new $20 open-source tool from the EFF that catches cellular spies in the act. In this video, we break down how it works, why it’s a game-changer for privacy, and how you can use it to fight back against surveillance.



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Rayhunter Announcement: eff.org/deeplinks/2025/03/meet-rayhunter-new-open-source-tool-eff-detect-cellular-spying

Rayhunter Githb: github.com/EFForg/rayhunter

Install ADB and these tools here:

sudo apt install curl build-essential libc6-armhf-cross libc6-dev-armhf-cross gcc-arm-linux-gnueabihf
rustup target add x86_64-unknown-linux-gnu
rustup target add armv7-unknown-linux-gnueabihf

Debian/Zorin workaround

# Start from the directory that you unpacked the release into
sudo apt install -y cargo
git clone github.com/EFForg/rayhunter
cd rayhunter/serial
cargo build
cd ../..
sed -i 's|./serial-ubuntu-latest/serial|./rayhunter/target/debug/serial|g' install-linux.sh
./install-linux.sh


github.com/EFForg/rayhunter/issues/93