>I don't quite get what they are "spying" there... the issue with SIGINT on the roofs of Russian embassy etc. Is there anything to be got that can not be colle

>I don't quite get what they are "spying" there... the issue with SIGINT on the roofs of Russian embassy etc. Is there anything to be got that can not be collected anywhere else, specifically in Russia? GSM, 3G, 4G, 5G interceptors, cellular tapping and eavesdropping Stingrays, also known as "cell site simulators" or "IMSI catchers," are invasive cell phone surveillance devices that mimic cell phone towers, and send out signals to trick cell phones in the area into transmitting their locations and identifying information. cell site simulators : <https://en.wikipedia.org/wiki/Special:Search?search=cell+site+simulators https://en.wikipedia.org/wiki/Special:Search?search=cell+sit...> WiFi snooping bases, etc.