I read somewhere how the police once solved a crime by analysing a cigarette butt left behind in a stolen car, but within a few years it was quite common for them to find that a stolen car had its ashtray filled with cigarette butts apparently taken from a public ashtray: even joyriders were clever enough to thus outwit forensics. So it would seem weird to me if armed robbers or professional burglars were carrying switched on phones, and most crimes are committed by people who commit multiple crimes, as I understand it, people who have plenty of experience of how the police and the courts operate.
In online discussions there are always people who claim that criminals are idiots, but I don't think that's accurate. I reckon that when it comes to crime, most criminals are in effect a lot more intelligent than I am with my elite university degree and so on. But in general, the older I get, the more aware I become of my own limitations and the less likely I am to dismiss anyone else as an idiot.