Galaxy S 4 Active phones are advertised as water-resistent, which means it’s often portrayed as submerged in pools of water. In real life, however, this is not as safe as one might expect. That’s why AT&T has offered to replaced the water damages, but only once.
Samsung designed and tested the Galaxy S 4 Active to adhere to IP67 standards for water resistance (1 meter for 30 minutes). If your Galaxy S 4 Active has been damaged due to water exposure, bring it back to an AT&T retail store as soon as possible for a one-time exchange for another Galaxy S 4 Active.