Waterproof Galaxy S4 Active warranty won't cover liquid damage, AT&T employee complains26
In fact, even if you follow the instructions like closing all flaps and not dipping the phone in anything else than shallow water for less than thirty minutes, the warranty still won't cover it, says an AT&T employee over at XDA-Devs forum thread. What Samsung says in the warranty leaflet is the following:
Last we checked water is liquid, so, bummer. Not that other waterproof devices are any different, since these warranties are a standard fare, but the AT&T guy in the thread below complains that he took all measures he's been trained to, and his S4 Active still started acting up after doing a fish tank footage project. Word to the wise.