Tested a Nokia 6280 3G on the weekend with a 2005 e53 BT ULF (no nav)and it did everything except SMS display. Connected fine, auto-synched the phonebook and made and received multiple calls without dropping the BT connection. Note that this model runs Nokia Series 40 OS. The N70/N90 etc run Series 60 Symbian OS and apparently don't work with BMW BT. Damn.