“ If you don’t want someone to hear YOUR signal, or locate you from YOUR signal, turn off whatever device YOU are transmitting from.”
Turning off phones won’t keep them from broadcasting from your microphone, camera or gps ping from towers.
Might want to update your tech background.
You might want to update yours.
You can put your phone in an RF proof envelope or even RF shielded cloth bag. They make them and they are cheap.
No need to interfere with everyone else around you just because you are paranoid.