Jumper device for answering mobile calls using car speakers jumperjack phone dev

Segawa

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Oct 9, 2009
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whats the website for that Device called a jumper jack for answering mobile calls via car speakers
 

doc969

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Oct 31, 2009
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whats the website for that Device called a jumper jack for answering mobile calls via car speakers, and does it work?
 

Roy81

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Jan 3, 2010
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have a help web site for jumperjack. Its www.JumperJackHelp.com. My jumperjack just increases the the music volume on 99.3 fm when I use the radio volume control like they tell you do to increase the caller volume.That web site doesn't help solve my problem. so the jumperjack is worthless to me.
 
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