At work I had the opportunity to upgrade to a bluetooth phone, the Cisco 8851. It has bluetooth built in so it connects to my hearing aid bluetooth device, the Phonak Compilot 2. It connects quickly and the quality is good. I previously used a Plantronics MDA200 with a bluetooth dongle, the SSP5714-01.
The description of the phone includes a tcoil handset, but mine came with a regular handset. Apparently I have to request that separately.
I can recommend the phone for office bluetooth phone use and Webex meetings.