this post was submitted on 19 Sep 2024
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I suspect it works a lot ore than 30%
As you mentioned, cell ID is there too. Pretty easy to simply capture IMSI data (don't even have to do anything, phones are alway broadcasting their ID).
Combine IMSI, BT, MAC, date/time, and boy you've got one helluva surveillance device.
Add in BT headphones, watches, etc, and you have even more data points to associate.
I wouldn't be shopping there just because of that.
Actually, no. Phones don't always broadcast their IMSI. Most of the time they broadcast a Temporary Mobile Subscriber Identity (TMSI) and only on a location update (For power conservation). Your cell provider knows your IMSI already and uses a TMSI for updates for the express purpose of privacy and security for these exact scenarios
It is part of the initial work flow of a Stingray device to attempt to force your device to disconnect from the network and get it to rebroadcast its actual IMSI. But it is not floating around in the air all the time and it certainly isn't trivial to grab.
BT is really the only viable option, and even that can vary wildly depending on manufacturer.