Business idea:
Create Fridges and Microwaves with 10 digits Pin Lock.
to make her loosing weight, just change the pin number each day.
To stop her from gossipping, put the phone into the fridge or microwave.
Nahw, usually Frdige and Microwave are made out of metal and that is grounded.
Which prevents any kind of radiowaves from going in or out. A
A Faraday's Cage. You got the idea.