The latest rumours indicate the next-generation iPhone won't boast any design changes, but it might come with some major spec bumps, such as a 4K camera.

The next iPhone, thought to be called the iPhone 6S (there could also be an iPhone 6S Plus model), will feature two new cameras, including a 5-megapixel front-facing camera with a wider field a vision and a 12-megapixel rear-facing camera. The camera on the back will also shoot 4K video and 240fps slow-mo.

Keep in mind the iPhone 6's rear camera is limited to 1080p recording. Also, all these new details supposedly came from a Foxconn document leak and were posted to China's Sina Weibo. It's not clear if any of this is legit, but it goes along with other reports about the iPhone 6S focusing on camera upgrades.

9to5Mac also recently published leaked photos of the iPhone 6S' rear casing, which indicated the smartphone will look exactly like the iPhone 6, but with internal changes. If that's indeed true, Apple's engineers are probably actually spending time bulking up core iPhone features, like the camera.

Check out Pocket-lint's rumour round-up for more clues about what the next iPhone might feature.