Lauren wants to know what is the most waterproof phone on the market. Leo says that IP ratings measure the water resistance of a device. The iPhone has an IP rating of 68, which means it can be waterproof in 3 feet of water for up to 30 minutes. But the charging port can still be a place where water can get in. That also doesn't include saltwater. The rating is really more for splashes of water. Samsung's Galaxy Phones are also rated at IP68.