Will a cell phone or walkie-talkie work from inside a bank vault?

This is for a story. I need a character who's locked in a bank vault to communicate with someone on the outside but I don't know what kind of signal would get through.Will a cell phone or walkie-talkie work from inside a bank vault?
No, the only thing I can think of would be a camera and a mic inside and and a camera and a mic in some sort of control room outside it, could be there to monitor the vault and/or talk to people on the inside when the vault is open.Will a cell phone or walkie-talkie work from inside a bank vault?
For a story, you can take your artisic license on physics.



If you must obey physics, I would say probably not.Will a cell phone or walkie-talkie work from inside a bank vault?
more thank likely

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