The best mic in a cell-phone headset?

Hi,

I run a pro audio related business. We use exclusively cellphones. I am
looking for the very best sound for my clients, ie the best microphone
in a cell-phone headset.

I can't find much info about this. There is some info on bluetooth
headsets, but I wonder how the best sounding bluetooth Hz compares to an
average corded one.

DSP for noise cancellation and/or wind is not so much an issue here (it
can actually be a downer) as a natural, full bodied, voice sound.

Any idea or ref?

Thanks,
jp

--
Jean-Pierre Côté
Montréal, Canada
mailto:jpcote2@videotron.ca