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Old 06-09-2008, 07:04 PM   #6 (permalink)
Talking BlackBerry Encyclopedia
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Join Date: Dec 2007
Location: London, UK
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To be able to hear the call over the sound system in your truck, you'd need the special 3-ring jack cable. Check out the hands-free kit that came with your device, see the jack? 3 rings, the third being the one that enables the phone call via the jack socket and also allows you to use the button on the cable splitter.
Find yourself a jack with the third ring and it should work.
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