Hello?
Are you listening?
These things are CODED RADIO TRANSMITTERS!
As long as they are “ON” you have no idea what they may or may not be doing.
As long as you are within spoken range of ANYBODY’S phone, notebook, laptop etc. YOU HAVE NO PRIVACY WHATSOEVER!
Welcome to our new world.
I have some knowledge of radios. (and computers)
Not every appliance in the house is a bug. Not every cell phone is constantly monitoring every thing around it. Yes, it is even possible for a cell phone that is off to be a bug, if the right people want that to be activated.
I have constant battle with Google over my cell phone. I give them the minimum data possible. It that “zero”, no.
Have had my phone scanned by a script that I could not shut off. I was in range of a public Wifi when it happened. It took total control of my phone, without actually searching for a web connection. Spooky.
So you simply do the best you can. This is the real world.
I hold a commercial radio license and built my first PC in 1982. But I’m not a computer programmer.