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The Galaxy Note 7's S pen is considerably bigger than a head phone jack, yet the phone is water proof even with the pen removed from it's slot, so my guess is that can't be it. Assuming, of course, that anything Samsung can do to water proof a phone, Apple can too.

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Never used a Samsung Note 7 but does anything in the pen holder connect inside the phone or is it just a hole surrounded in plastic? With a headphone jack there are a lot (at least 3?) of connections that have to pass into the phone which could complicate the waterproofing.

It's got 3, but the lightning connector has 8.

Yeah that's what I really don't understand about all the focus on the waterproofing of the 3.5mm jack. The Lightning port is still there and that has to be at least as hard to waterproof as a 3.5mm jack right? Did Apple design the Lightning port to be waterproof from the outset? If so how did they do it and can they apply that to the 3.5mm port?

I hadn't thought of that to be honest, and I've never used one either, but from review videos, it seems that the phone detects when you pull the S pen out, so I'd guess there's some kind of connection.

Plus the battery helps excess water evaporate :-)

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