Hi ! sorry but i don't speak english very well !
i have a problem, i have a carkit112 and 6310i and all it's ok, but when i try to use a sonyericsson t68i or p800 all phone see the carkit and viceversa, but the phone don't use a carkit...(but is connect !) why ?
T68 is not supporting the Handsfree profile. I don't know if the P800 does. But you have to have a devisce which is supporting the Handsfree profile not Headset.