Re: Re. kill switch
You'd also have to be able to tell the cheap models from the expensive ones quickly by sight.
The size of the big glowing rectangle on the front face is a generally good indicator.
Anyway, even if the thief can only get a tenner out of the parts, that's four bags of smack and maybe worth it to some people. The point about phones being broken down and sold for parts is a very valid one. Cars nearly all have immobilizers these days, and yet, Grand Theft Auto continues to be more than just the name of a computer game.
There's no substitute for a bit of common sense. Not leaving your phone on the dashboard in the middle of a city centre for instance.