Front drive bays are usually plastic covers, and there is a lot of EMF leakage, so they act like a Faraday cage, but are far far from being one.
Tip: Fridges and microwaves are pretty good if you need to have a bug free conversation and you don't have access to your phone battery to switch it off. If you can't pull out your phone battery your PHONE IS NEVER OFF. ;^)
Do be aware that there are MICROPHONES in many places there are CCTV, so a conversation on a park bench isn't the way to go anymore.