Rayhunter IMSI-Catcher Detector

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

All of the protest groups in every area need to arm themselves with Rayhunter in order to detect the IMSI-catcher (Stingrays) being used in their area by police, ICE, FBI, etc. The use of Stingrays violates the Fourth Amendment because it sweeps up every cellphone in the area instead of just the target. The device is being abused by law enforcement to spy on people (especially protesters).

Rayhunter is open-source and runs on an Orbic mobile hotspot which costs around $20.