Water was never a friend to electronics, but there have always been phones with an adventurous spirit that have protection against the elements. The Benefone Esc! from 1999, famous for being the first cell phone with a built-in GPS receiver, was shock and water resistant. But that was before phones were given official IP codes, so we’ll fast forward to 2008.
But first, a crash course on what the numbers mean. The first digit measures the protection against solid particles, the second is protection against liquids. We’ll focus on the second digit.