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EFF creates a $20 device to detect cellular spying: Rayhunter

Ellsworth Toohey
Mar 05, 2025
∙ Paid

Rayhunter device lets anyone detect police phone surveillance (EFF)

The Electronic Frontier Foundation (EFF) has created Rayhunter, a $20 device that helps people detect if police are using fake cell towers to spy on their phones. The device uses a simple traffic-light system — showing a green line when everything is normal, changing to red when it detec…

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