Eli5: Would Faraday Cages block Cell Signals well enough to utilize them in a classroom setting?

Question

I.e. ‘bricking the phone’ for the students benefit

In: Engineering

Answer 1

yes, I have a faraday fabric I ordered off amazon to put up against the wall where my breaker box is to help eliminate EMF so my guitar is less noisy when im playing. I wrapped my phone in it for fun and had my girlfriend call me and it didn’t work.