IP67, IP68, IPX8 - what do these waterproof ratings really mean? Can you take your iPhone or Samsung Galaxy swimming?

Sometimes you'll see an IP rating with a number replaced with an X, such as IPX8. In this instance, a company hasn't provided ...

Q: I know that iPhones are supposed to be waterproof, but how reliable is the protection? A:Virtually every smartphone made by every manufacturer today has been designed to be water-resistant but ...