How do i get my in-car phone in my 2001 bmw 525i to work?

i just bought a used 2001 bmw 525i, and it didnt come with the separate owner's manual for the in-car telephone. i dont know how to use it, or how to get it to work, so i was wondering if anyone could help me with this.|||BMW dealers have to "activate" it. All the wiring is there, give the phone/handset to the installer, they connect the cable/jack, then you're poorer $200-350 with an outdated Siemens phone.|||It'll require a subscription


See your local dealer