yeah, but they had a lot of manufacturing infrastructure, and they had some very good scientists.
i don't see IS making mechanical gyroscopes on a large scale, and every discarded smartphone from the last decade makes for a perfect drone platform.
this was only a matter of time, with IMU's and position sensors so widespread and cheap today, all we can do is to try and restrict export to these countries, but sooner or later it will get out there too.
make the phone go into wifi hotspot mode where the ssid is an asymmetrically encrypted string that is recognized only by phones nearby running the same App, which try to connect to the internet themselves, or do the same thing..
Or an emergency wifi network maybe ?