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The X-RAY photo shows that the short cable leading to the 3.5mm end is already analog, so it’s not part of any lightning data connection. Kudos to apple for fitting it into a Lightning connector shell though!

iOS recognizes the adapter as USB audio device; that's why if you have older headphones the wire-remote controls do not work!

I was wondering if phones get taken apart for repairability grading, do any of these phones get put back together? :)

The taptic home button is extension of the 3D touch. Where on the 6S the haptic feedback signaled a single "pop" out menu, the home button feedback happens on keypress and keyup. :)