I've been watching a French show Bureau which has a lot of hacking/spying technobabble, but as far as those things go I think it has some interesting actually p

I've been watching a French show Bureau which has a lot of hacking/spying technobabble, but as far as those things go I think it has some interesting actually plausible things. - Locate a phone using discovery data from nearby Bluetooth devices under adversary's control - Track/access a turned-off phone via a secondary battery-powered GPS module (or similar, like in new iPhones) - Localize nearby phones via IMSI catchers The main implausible line of plot devices there are the ability to access any target device at will, just a matter of time/effort. This alludes to organizations having access to zero-day exploits but that's still very unlikely to work against a random phone.