There's a much more mundane explanation - waterproofing. Lightning and USB-C connectors can both be made intrinsically waterproof up to IPx7, while the 3.5mm jack can't. Waterproofing is a key point of differentiation for recent flagship phones. An iPhone 7 will survive a dip in a toilet bowl or a pint of beer, but an iPhone 6 probably won't.

> while the 3.5mm jack can't

Of course it can. It's just 3 or 4 wire connections, and an insertion switch.

Why do you think it can't be made waterproof? It's even easier than USB-C to waterproof.

A simple google search "waterproof 3.5mm socket" find tons of results.

So all the other phone manufacturers selling IP68 phones with headphone jacks are lying?

I had a Xperia Z5 and every time water touched the headphone jack the phone would go crazy thinking that I was plugging and unplugging something repeatedly.

On the assumption that the phone itself is fine, that could be fixed in software.

Plenty of phones where waterproof before. The lightning port is waterproof despite having many more pins than a simple phone jack.

I don't see the difference in the connector and how that can determine how waterproof the phone is. In the end, lightning/usb-c and 3.5 are just sending electron via a connection, how would the format determine how waterproof you can make it?

To all the people saying "but waterproof 3.5mm", here's the thing. Despite having _more pins_, lightning and USB-C have the advantage of _active signalling_. So not just an "open/closed" signal, but an active communication saying something was plugged in. So while 3.5mm can be made where it doesn't damage the phone, water will still short the open/closed switch, causing false insertion events.

Yeah, that must be it.

http://www.tradekorea.com/product/detail/P698873/IP67-waterp...

well then sony had been lying to me for years. the last 3 phones I've owned have had waterproof headphone jacks

You are wrong there.

There is a lot of conjecture happening here. I'm sure it doesn't hurt to know data about headphones but I'm having doubts that's the primary motivator.

Yeah, I am not saying this is happening right now (however this log from Spotify is alarming).

However, considering that they will have this option is sufficient to someone in the industry to abuse it, and after someone start to use this information, everyone will to remain competitive.