It cost me a cool £900 for a phone to be retro fitted into my XK8... Though the reception is excellent, no wires, nothing visible... People think I am calling from a fixed landline, as opposed to a hands free mobile, as Pete says its all controlled through the radio interface.
Was it worth it?
Hell yes - am always on the phone...
But guys at Jaguar office, if you're reading this - it would be good now just to have a bluetooth connection into the radio/entertainment devices... Would save having to copy numbers from regular phone to carphone etc. And save us all being hostages of Vodafone for the multisim (Pete & Bob - thoroughly recommend the multisim as it leaves you with just one number, regardless of your phone).
S
Though I think I read somewhere that the head unit had to be re-programmed after fitting any things like phone, cd's etc so it may be that you/we have no choice
Good luck with your research and let me know if you find anything.
Pete