I have a 2012 Nissan Sentra SR (USA), with the default head unit that has an iPod cable. Ever since maybe iOS 5 or 6, it hasn't reliably connected with my iPod touch (a 4th gen and a 5th gen), and when I had an Android phone, I (obviously) couldn't connect it to the iPod port. I have an iPhone now, but with the current iOS, I'm still not able to use it reliably.
What usually happens is that the iPod/iPhone isn't detected as connected, or if I try to play something it just says end file or hangs.
Is there an adapter I can install so I can use any phone and still use steering wheel controls (without replacing the head unit)? If not, I have to use an aux cable, which isn't the end of the world, but I like having steering wheel controls.