I have tried a Nokia 6230i and Nokia 6233 (which was supplied with the car), both work fine but only the 6233 shows the phone reception on the i-drive screen. Other than that all bluetooth functions available on both. One advantage of getting a phone which has a BMW cradle is that the reception is boosted by the phone antenna in the roof fin. (which is a good thing in Australia as there a lot of areas with poor reception)