If I recall correctly, training the system is via a command that is either "store number" or "save number."
The issues aren't between iDrive and a phone but the TCU and a phone. Nokia mobiles in general, esp. in the N series, are not generally regarded as compatible. Some may work partially but even Nokia executives commented to me that they are a bit bummed out by this since a few of them own BMWs.
Naturally. Isn't Nokia the largest mobile phone maker in the world? Looks like it's the Apple for me. Thanks for the info.