Hands free radio

Hi,
I have a 2007 activ version of the Micra which came as factory with hands free and steering wheel controls on the car, however my head unit is now worn and so whenever I go over a bump (which is very often in the south of England) the CD skips. Im looking to upgrade to head unit with AUX, however I was wondering if I do that will I lose my hands free?

I will buy the patch lead for the steering wheel controls to work and I was wondering as it appears as though the hands free doesnt work through the radio, as there are no call controls on the radio itself and the pairing procedure did not involve the head unit at all.

Any Ideas?
Thanks
Ricky
 
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