iPhone 7 may be Apple's first waterproof handset
There is a possible IP67 certification on the way for the iPhone 7 if these rumours prove to be true. This would mean that the iPhone 7 would be completely protected against dust, while it would be protected against water immersion between 15 centimetres and 1 metre.
Interestingly, some tests have found that the iPhone 6S and 6S are water resistant, though Apple hasn’t even hinted at this being the case. Zach Straley submerged the two devices in water and they survived a full two days in water.