One of the longest-standing and most controversial rumours surrounding the upcoming iPhone 7 is that it will have no headphone jack. If two leaked case designs for Apple’s next handset are to be believed, it would appear that the company is about to get rid of the 3.5mm industrystandard port in September and encourage users to adopt Lightningport headphones instead. So why would the tech giant consider such a radical move? The most common explanation is that the jack takes up too much space inside the phone’s chassis and is preventing delivery of thinner smartphones. Rumours suggest the iPhone 7 will only be 1mm slimmer than the iPhone 6, but removing the standard headphone port would open up sufficient scope for future devices to be ever slimmer. However, the world’s current slimmest smartphone, the Chinesemade Vivo X5 Max (which is only 4.75mm thick), continues to feature the traditional audio port, so the headphone jack doesn’t seem an impediment to slimmer designs. Another reason for phasing out the headphone jack may be because screen hardware and headphone jacks don’t always mix – indeed, on most smartphones, the jack usually ends where the screen begins. Ridding the iPhone 7 of the 3.5mm port would open the possibility of a complete end-toend display, which could lead to removing the Home button as well.