It's all very confusing!
»www.tuaw.com/2012/09/13/lightnin ··· out-doe/
»reviews.cnet.com/8301-13746_7-57 ··· he-dust/
I had a professional audio interface that used analog audio pins to get audio in/out of an iPhone 3G. When I upgraded to 4S, it was rendered obsolete because the new phones only supported USB audio. What a mess!