An interesting technology development as standard headphone jack may no longer be an option due to the very thin design of this future model

http://www.techtimes.com/articles/111442/20151128/iphone-7-and-iphone-7-plus-design-will-be-so-thin-3-5mm-headphone-port-will-be-replaced-with-lightning-port.htm

A new report claims that Apple’s next-generation iPhone 7 is going to be so thin that the company will abandon the 3.5mm headphone port. Instead, the iPhone 7 will use its Lightning port to listen to audio and ship with Lightning equipped EarPods.  When Apple introduced the original iPhone in 2007, it was the first of many backlashes the company would face in terms of the design of its smartphone. Most iPhone owners were out of luck when it came to using their favorite headphones with the smartphone because its 3.5mm headphone port was recessed several millimeters. Most users either had to suffer and use Apple’s iconic but uncomfortable headphones that shipped with the iPhone or buy a special adapter or updated headphones that were designed to fit in the port.