Not a resident, but I have spent some time there. Phone service is indeed cheap. SIM cards are bought at every kind of venue right on down to carts on the stre

Not a resident, but I have spent some time there. Phone service is indeed cheap. SIM cards are bought at every kind of venue right on down to carts on the street. No ID needed, no contract. You give money, you get SIM card with nn minutes. Handsets are cheap too, really cheap, like throw away cheap. I hadn't thought about that from a signals intelligence perspective, but I bet that fact combined with the density of people would make it quite challenging to find his signal from among the others. Speaking of people density, guaranteed, no drone strikes in HK. Also, probably no movie-style snatch and grabs in HK. Aside from the tension that would cause in US/China foreign affairs, traffic would prevent that from happening most hours of the day. It would definitely not go unnoticed.