We take a peek below the reflective film and, to our surprise, we find a new, second layer of sensors—likely the capacitive sensors that support 3D Touch.
Why exactly did this discovery surprise us? Apple had previously stated that 3D Touch functioned using sensors integrated into the backlight, but this seems to be a separate component entirely.
Repairability note—the home button cable has been replaced by traces along the side of the 3D Touch sensor panel. We'll have to wait and see if this is for better or worse.
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