Once upon a time, waterproofing was rare on a smartphone, but these days, not only do the best Android phones you can buy have IP68 waterproofing, but the most worthwhile budget Android phones do, too. When OnePlus was the scrappy upstart "flagship killer," it would have the seals to try and keep water out but not pay for the official certification because of the costs involved. It couldn't advertise its phones as being waterproof, but owners could be pleasantly surprised if their OnePlus phone took an impromptu dive into the bathtub.
