Yes, but it cannot detect which specific device is connected to the jack and act...

zepto · on Sept 8, 2016

Also not true - the analog jack is bidirectional, so there is no reason that devices should not be required to handshake when plugged in.

Elrac · on Sept 8, 2016

I believe you're wrong about that.

A headphone socket can report whether there's a jack plugged in or not - that one bit of information is the total extent of traffic in the reverse direction. There is no electronic standard for back talk from analog audio devices, and it would be pointless for Apple to try, because no analog device currently on the market would comply with it.

Sephiroth87 · on Sept 8, 2016

Not really, considering it's the same port used for microphone input, playback controls, and third party devices use it for communication already...

0x0 · on Sept 8, 2016

Pretty sure the old iphone jack works both ways as you can use it to connect a microphone.

That's how those stripe card readers work, sending "modem noise" into the phone: http://www.instructables.com/id/Read-any-magnetic-strip-card...

zepto · on Sept 8, 2016

I'm not wrong. Apple could implement a new standard for handshaking. Only approved devices would implement it or identify themselves correctly. Current analog devices would be treated exactly as they will be using the adapter shipped with the iPhone 7.