Aluminum foil works as well as a bag made from woven wire
I wonder about an ordinary potato chip bag. In those I throw away, the interior is metallic film coated. Place the phone in a potato chip bag, seal the end and then call it from another phone. If it doesn’t ring then the potato chip bag is s de facto faraday bag
Great suggestions, and very resourceful. My thanks to all of you! FReepers are a great source for info on all kinds of things.
Best, AFB-XYZ
Your common, everyday microwave is a faraday cage by design.