[Tilted Irish Kilt]

upchuck:" .. you can make your phone invisible by putting it in a mylar potato chip bag.
The bag forms a "Faraday Cage" which prevents receiving and sending radio signals."

"Let the chips fall where they may ..."
It might also depend on the mill thickness of the mylar bag
I know that many electronic parts are shipped in mylar
Maybe a good time to 'recycle' some of those bags, and see if Apple or Google continues to send you updated location temps and time ?

[upchuck]

I had read about this so some friends and I tested it.

We took a cell phone, put it on vibrate and called it. The phone, naturally, vibrated. Then we put the phone in a mylar bag that once held chocolate chip cookies. Called the phone again. No reaction from the phone in the bag. We tried this with three other phones and always got the same result.