there are two BMW partnumbers ending xxxxx307 xxxxxx308
308 is the multimedia version which works perfectly it seems in all suitably equipped vehicles without iDrive
works in my 13 X1 with B/T and enhanced B/T features does exactly as I would expect but I do not have iDrive ( choice )
The 307 works as a basic cradle in my 07 Z4 holding ,charging and enhanced cellular signal .Exactly as I expected
I use an iPhone 4 and 5 both on iOS 7.0.4 and also worked on all earlier versions of iOS7
Key is no iDrive ,that is what BMW are working on ,a version, that works with iDrive