Where do i find the hearing option for hearing aids in settings

Hi try this out....Turning on, then turning off "Hearing Aid Mode" fixed the problem. The audio switches automatically between headphones and speaker normally now.
Hearing aid mode is under "System Settings" -> "Accessibility" -> "Hearing Aid Settings

It looks like you may have a Sennheiser 840S. There is a t-coil option, however, you can plug in any standard headset to the port on the side and use the device without your hearing aids. It's port #5 on page 2.
SENNHEISER SET 840 06 09 Instruction Manual Page 2

Go to web site download pdf and or translate to English .

Hello Debb,

Please visit the link provide below :

http://www.gen-i.co.nz/Solutions/Mobility/Device_Documents/Nokia%20E71/Setting%20up%20Voicemail%20on%20the%20Nokia%20E71.pdf