Bro,
So far, i've tried personally with K750i & Motorola V3...and both connects via BT without any problems but it does not sync the phone book. Below are the list of phones that compatible with BMW BT :
Motorola:
RAZR V3, V330, E815, V551
Sony Ericsson:
T608, T610, K750i
Nokia:
6310, 8800
Siemens:
S56
I'd assume the new "W800"(i think) should be ok since it used the same K750i platform.
I still dont change my phone to said models cause if suddenly my gf call while my wifey around.....phuh thats it....balik tidur luar woo....just kidding....no money, infact the phones getting xpensive nowdays.
Bro, but for you...please consider BT compatible phones with in-built water resistant. :nyehehe:
It might come handy later on.......