Only the later ones have phone/bluetooth but I did install a (fixed) phone in the LS430, got it off of e-bay- a motorola- I think the only ones making fixed phones now. Had some problems getting the unlock code but found someone on the internet, fitted an internal aerial, a stick on thing up the side of the screen, and wired it in fairly easily -theres plenty of room alongside the transmission tunnel and behind the footwell carpet. fortunately, there'd been a fixed phone before so the power, taken from the footwell fuse box, passenger side just in front of the door hinge, behind the panel was easy to connect. Bolted the speaker box to this panel and to avoid unsightly holes bought a customised clip on colour coded panel which affixes to the left of the transmission tunnel. All in, fitting it myself, around £150 but you have to supply your own sim card. The great thing is that the control unit has a "permanent" sim which you insert -any sim card- under the carpet, but you can also insert a temporary sim card in the handset from your own mobile. If there's no temporary sim card fitted it defaults to the fixed one. It's only fixed because you'd need to hoik up the carpet to change it.
By the way it's all handsfree, with a mike cable hidden behind the screen rubber and on a t-mobile card it seems to work everywhere I've been, even in areas challenging for a mobile
Even though I say so myself- and i'm no phone engineer- it's a great and easy installation even if I did fear doing it!