DIY: How to replace Steering wheel controls

Diverdown3

I have a Z which did not come with factory installed steering wheel controls for cell phones. I also have an aftermarket head unit with bluetooth. I have purchased a set of steering wheel controls which include the cell phone buttons.

Can anyone confirm that adding steering wheel controls w/cell phone buttons will result in the ability to answer calls, adjust call volume, etc.?

I have the Crux SWRNS-63U installed, but I am open to confirmation from anyone regardless of which brand steering wheel control adapter they have installed.

Thanks in advance for the responses.