Moving the DAC another centimeter or so from inside the phone to the Lightning plug isn't going to magically cure interference - at least, not when the device t

Moving the DAC another centimeter or so from inside the phone to the Lightning plug isn't going to magically cure interference - at least, not when the device that's supposedly interfering is already at the opposite end of the phone. Apple's engineers aren't stupid. If they didn't get a working 3.5mm jack it's because they didn't want to.