Re:My Phone Was Spying on Me, So I Tracked Down the Surveill...
by rcoveson on Thursday December 03, 2020 @01:05PM
(#25292189)
I'm sure there's plenty of RF energy to make a passive phone case that lights up when your phone is transmitting, which would detect this case if you were looking at your phone. Maybe having it emit a tone would be better.
It would be fun to see if you could get a modern phone to shut up for even five seconds when powered on.
There are specific bits of malware that make the phone appear to be off when it is in fact powered on. Such malware typically requires root access or an exploit, and is the realm of shady governments not advertiser's. But if you don't have that malware, you can't be tracked when the phone is off.