Hello I have an extra iPhone 4 running iOS 7. I also have an avhx5500. I plan on throwing my iPhone4 in the glovebox and do not plan on touching it. OK now what version of iOS should I downgrade to? Can some some please layout the sequence of events for me to accomplish this, I know how to downgrade and jailbreak. I just don't want to downgrade to the wrong version of iOS. Like I said I want to try and access as much of my iphone from the radio, without having to grab the phone out of the glovebox. Thanks.
