JoeSpareBedroom wrote:

This is my fantasy: I'm talking to someone who's using a Bluetooth thing
with their cell phone. I can actually understand them. It has yet to happen.

What about you?

I use an Xlink Bluetooth cellular gateway at home at all times. Since
the cell phone is always in the location for optimal signal strength and
is within inches of the Xlink, the voice on ALL linked "regular" phones
is crystal clear.

As RBM said, Bluetooth is a SHORT range wireless technology.