Apple has consistently worked at making the iPhone ever slimmer, and has been willing to make compromises to achieve that, most notably in battery-life. But with the iPhone 6 and 6s, it is close to the limit on how slim an iPhone can be – and the reason for that is the oldest piece of tech in the phone. The iPhone 6/6s is not very much thicker than the diameter of the 3.5mm headphone jack.

3-5mm

The latest iPod touch shows that Apple has a little more room for manoeuvre (above photo Anandtech, below iFixit).

ifixit

But really not much. If Apple wants to continue the iPhone’s diet, at some point very soon it’s going to have to ditch the 3.5mm headphone socket in favor of an alternative. There are four possible options open to it …  expand full story