I am able to use a cellphone when the volume is turned up. I've been using HTC Pocket PC (Windows Mobile) phones lately. Bluetooth headsets, though, are another matter; they're just barely too quiet for me to understand what is being said.
Does anyone have suggestions for bluetooth headsets that would produce noticeably louder volume than Plantronics bluetooth earpieces? A Plantronics rep told me that their headsets have the same maximum volume.