Just paired my iPhone 4

[wildag]

Originally Posted by rps

I just tried the dock extension cable in the car. It fits into the dock connector in the phone prep kit and all functions on the phone work. It's a 3GS now but the 4 will be here next Thursday. Saved myself $150.00 for the new cradle when BMW makes it available.

I highly recommend the Spec.Dock. Fits all models of the iPhone, and puts them in a very convenient place.

[rps]

Thanks, I have that but I also have the phone prep kit that mounts into the oddments door and holds the phone, charges it, sends the audio directly to the radio, and most of all uses the bumper antenna for the phone. Thanks to AT&T's great service, the bumper antenna works great with the phone.

[wildag]

Originally Posted by rps

Thanks, I have that but I also have the phone prep kit that mounts into the oddments door and holds the phone, charges it, sends the audio directly to the radio, and most of all uses the bumper antenna for the phone. Thanks to AT&T's great service, the bumper antenna works great with the phone.

The iPhone doesn't have an external antenna connection in its connector. Some one sold you some snake oil. Here's a pin out:

http://www.qables.com/shop/images/pdf/ipodpinout.pdf

Here's a retailer with an explanation that only a "passive" (aka worthless) external antenna can be used. And to be effective, it would have to be connected a signal amplifier, which is not a part in the BMW catalog.

http://www.wpsantennas.com/wa-1029-a...naadapter.aspx

Here's a search for "amplifier" in the Z4 part catalog. All of the results have to do with the radio antenna, or speaker systems.

http://www.realoem.com/bmw/partsearc...3&mospid=49345

The Spec.Dock does the other stuff as well.