Could the iPhone 6 be Apple’s thinnest ever handset? Concept images reveal new model could be just 3mm thick Apple surprised a number of people last year when it unveiled its super-thin iPad Air, and rumours suggest it could be working on making an equally slender version of its iPhone. Two concept images have emerged that show Apple’s next-generation handset with a slender chassis, as well as a larger 5-inch screen similar to those seen on the Samsung Galaxy S4 and HTC One. The first concept predicts the phone - dubbed the 'iPhone Air' - will be 4.5mm thick, while the second goes a step further showing the device as 1.5mm at the top and 3mm at the bottom. By comparison, Apple’s current iPhone 5S has a depth of 7.6mm, while the iPad Air is slightly thinner at 7.5mm. Up until August last year, Huawei was the record-holder for the thinnest phone in the world with its Ascend P6, at 6.18mm. This was then replaced by the Vivo X3 at just 5.75mm. In order to make the Apple phone super-thin, Fuse Chicken’s concept suggests doing away with the physical home button in place of touchscreen keys. SET Solution’s concept, instead, keeps the home button by making the bottom of the phone thicker than the top. It also appears taller than Fuse Chicken’s version in order to fit the larger screen. Apple’s iPhone has one of the smalllest screens on the market and many experts predicted the screen on the iPhone 5S would be the first to break the 4-inch mark - but it didn't. Apple’s CEO Tim Cook has previously said his firm has kept to smaller screens because they’re easier to use and more comfortable to hold in the hand. However, with main rivals Samsung, HTC and Nokia releasing phones with screens in the 5-inch region, analysts claim Apple may have to increase the size of their designs to appeal to more people. Last November, designer Martin Hajek created a concept demonstrating it was possible to increase the iPhone's screen size, without drastically increasing the size of the handset. In his image, the screen is shown as stretched to reach left and right edges. However, because the bezel would need to be a certain size to avoid the screen being touched by accident, when it’s picked up for example, the usable screen size would be much smaller reduced. According to Forbes journalist Anthony Wing Kosner: 'The only way I could see something that thin working for users, is if the material was flexible as well so it could easily slip into a pocket.' He continued that if Apple was capable of making a phone as thin as the concepts suggest, which would also depend on making the components small and thin enough to fit inside the chassis, it could also pave the way for foldable devices.