Apple’s iPhone 7 is claimed to be IP67 rated, making it suitable for water resistance at a depth of 1m for up to thirty minutes. That’s great if you happen to drop your iPhone in the bath, or for some reason, feel the need to reply to emails in the shower, but there will always be someone who takes things a little bit further.Perhaps too far, in fact, but it usually makes for great entertainment when they do. So when we heard about one YouTube taking an iPhone 7 for scuba diving, our ears pricked up.The hugely unscientific water resistance...