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Old 11-28-2011, 10:03 PM
Luna-01 Luna-01 is offline
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Location: Oregon
Join Date: Sep 2011
Posts: 37
Mein Auto: 2012 X3 - waiting
smartphone antenna connections


There is not a physical connection between the phone and the antenna--there is an inductive connection. The cradle contains an inductive pickup that couples your smart phone to the car's sharkfin. This is a direct route to the antenna designated "telephone 1 & 2 and does not relate to BMW assist cellular functions. The cradle holds the phone in a very specific position to align the smartphone antenna with the inductive pickup.

The advantage with the shark fin is that it is outside the car...a cell phone inside a metal car is severely compromised--that's why there are cell towers seemingly every two feet.

A lot of the confusion comes from no two cell phones being the same in layout or

All this info is available on the BMW Tech Info web site, which requires a daily subscription for unlimited downloads. You can also find some info on the BMW coders site--look for the combox document. You can see this antenna setup in the diagrams.

so, yes there's a connection, but it is not physical


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