S5 was also one of the first mainstream waterproof smartphone and came out almost 10 years ago, and had a replaceable battery without any tools. If the back wa

S5 was also one of the first mainstream waterproof smartphone and came out almost 10 years ago, and had a replaceable battery without any tools. If the back was screwed on vs clipped on (allowed with new laws), it could have easily been ip68 rated.