So basically I’ve setup a new cisco 7975 ip phone with asterisk but for some reason there is no option to enable wideband audio for the handset but there is the option to change it for the headset. I trying changing the firmware but no luck, I also tried changing settings in the SEP-MAC file but still no luck. The audio sounds tinny and crappy without wideband enabled 
and I’ve got it working on my 7961’s before so is this a hardware issue or just a firmware or setting issue?
Cheers,
Alex S