[Will.]

"The first Weibo posting claims that the iPhone 7 will feature a waterproof and dustproof design. Several flagship Android devices already carry this added layer of protection, so it would make sense for Apple to add it to its own flagship phones. The iPhone 6s and 6s Plus don’t technically feature a waterproof design, but early tests have shown that the phones are significantly better at handling water than previous generation iPhones.

Another Weibo post goes on to claim that the iPhone 7 will feature a new casing material, meaning that the iPhone 6s and iPhone 6s Plus are the last iPhones that will feature a metallic frame. It’s unclear what that new material may be, but it is said that Apple has already developed the first prototype of the device."