My iPhone 4 can not be read by my JVC car radio after upgrading to 5.0

My iPhone 4 has always worked with my jvc radio until I went to 5.0 radio just says cannot read and phone says cannot playI whish Apple would fix this problem.

I figured out my problem. When I upgraded to 5.0 my ITunes did not sync correctly so when I tried using it with my Jvc car radio it locked it. So I restored my iPhone and tried it again with no luck so I reset my radio and what do you know it works perfectly now. So if anybody else has had a similar problem try it before replacing your head unit.

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