Graham Bell, Thomas Watson and Thomas Edison Ghost Phone Theory over Bluetooth

I made this 3 months ago but forgot about it.

After watching Proving Demons video about the spirit phone (you can watch it here: I thought I would try and localise the feedback using bluetooth.

Instead of creating a huge radio loop using mobile to a cellular tower and them over to the other phone, it could be localised at the exact location of the phone.

Just an idea.