@douglasvb @ai6yr there are already Apps like #AirGuard to do that.
https://f-droid.org/packages/de.seemoo.at_tracking_detection/

- Tho it's mostly designed to find #Trackers like #AirTags that are being abused for #Stalking.

- I guess a combo of #RTLSDR + #Ubertooth + #YardStickOne + #AWUS036 would be needed alongside some Software to get a full-spectrum (25-1700 MHz, Bluetooth & 2,4/5,1/5,5/5,8 GHz WiFi) scan, or buying a bug finder that works in these bands.

This however doesn't help against mandatory trackers like #eCall!