I've been watching the 1970's series of Survivors on Youtube; re-living my spotty youth. I couldn't bear the newer version, too right-on and multi-culti for me, and in any case if you watch all the way to Series 3 of the old one you'll see SLR's and steam trains. However, it got me thinking of how much modern technology could work if 99.9% of people had died (I drive around a lot, so my mind wanders). The car satnav would presumably work, as the satellites would still function. Mobiles and other phones couldn't work without electricity, but what about satellite phones? Presumably you'd need an account set up somewhere on a computer. Does anyone have any idea of what could work regardless if there were people around?