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      07-06-2011, 04:34 PM   #36
Bustofa
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United Kingdom
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Drives: F25 X3 XDrive20D SE
Join Date: Mar 2011
Location: Washington, UK

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Quote:
Originally Posted by sfax View Post
I'm certain the description for the iPhone cradle says "boosts signal through the car's aerial" or words to that effect. l
Indeed it does. This is an extract from the product description for the iPhone 4 adapter (my emphasis):

A safe and secure docking system, suitable for Apple iPhone 4 mobile phones.

Thanks to the interchangeable, phone-specific snap-in adapter, drivers can make calls hands-free. In conjunction with the Bluetooth interface, it enables you to charge the mobile phone battery. Supplied with an external aerial, which improves reception and ensures that any radiation is dissipaded outside the car interior, while charging their handset at the same time. Operation is via the iDrive controller, multi-function steering wheel or voice control. More information available on request.
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