2001 V70XC: Can you remove the head unit but keep the integrated phone?

Hi,

I own a 2001 V70XC with the HU-803 head unit and I also have the integrated phone..

I read the article found here

and I wantedto do something similar.

I've made two posts already on

about it `08and `05). My main concern is whether the integrated phone is still usabe if the head unit is replaced.

Thanks for your help.

Regards

Mastiha