Is it true that a microwave oven can act as a Faraday box to prevent your CELLPHONE from transmitting? Why isn't this more widely known?

I was watching Colbert and Zachary Quinto mentioned this while discussing the movie about Edward Snowden.

If true, that’s certainly a handy bit of info to have. So I’m curious as to why it’s not more widely known.

Or maybe it is well known and I’ve been living under a rock?

If true, were you aware of this?I know that you can remove the battery if you want to prevent being tracked through your CELLPHONE but simply putting it in the microwave seems like a whole lot easier.

Plus, unless I’m mistaken, you can’t really remove the battery on iPhones, right?

Anyhow, I find all of this pretty interesting. What do you know about all this and any other salient facts? Please share.