Sand, salt, and water are probably three of the worst things for your phone, but I can’t possibly leave mine at home. I tried using a zip-top bag, but it just wasn’t cutting it. Instead, I now pack a lanyard phone pouch, similar to the kind people use at water parks. I still have to take my phone out of the zippered plastic pouch to snap a photo. But because the lanyard hangs around my neck, I won’t drop it, and my phone can return to the safety of the pouch after I get my shot.