[Galaxy S 4 Active General] DanMc85:
http://www.samsung.com/us/support/howtoguide/N0000003/11161/130666/SGH-I537ZBAATT

How do I ensure my Samsung Galaxy S® 4 Active™ remains dust and water resistant?

Maintain Dust and Water Resistance

It is important your device stays dust and water resistant. You can do this by properly installing the battery cover, and properly seating the USB cover.

Before use, close USB cover and firmly seal battery cover at each of the arrow points on the pictures below, and then firmly press the AT&T symbol to create the seal at the camera/flash opening (See instructions below).

DO NOT ALLOW DEVICE TO GET WET UNTIL YOU HAVE COMPLETED ALL THESE STEPS.

Note: Microphones may take up to 24 hours to dry after extended immersion.

Important!: Immediately rinse the sealed device gently with clean water after contact with salt water or other substances.
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Note: Make sure the battery is properly installed before installing the battery cover on the device.
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Place the back cover on your device.

There are 20 “snap points” around the back to ensure the cover is tight. Press along the edge of the back cover until you have a secure seal and it clicks into place. Make sure to firmly press the AT&T symbol to create the seal at the camera/flash opening.

Install the USB Cover

Properly insert the USB charge port cover into the charger/accessory jack on the bottom of your device.

Note: The headphone port is waterproof without a cover and the Touch screen will not work in water.

From Warranty Page:

http://www.samsung.com/us/support/service/warranty/SGH-I537ZBAATT

What is not covered?

This Limited Warranty is conditioned upon proper use of the Product. This Limited Warranty does not cover: (a) defects or damage resulting from accident, misuse, abnormal use, abnormal conditions, improper storage, exposure to liquid, moisture, dampness, sand or dirt, neglect, or unusual physical, electrical or electromechanical stress; (b) scratches, dents and cosmetic damage, unless caused by SAMSUNG; (c) defects or damage resulting from excessive force or use of a metallic object when pressing on a touch screen; (d) equipment that has the serial number or the enhancement data code removed, defaced, damaged, altered or made illegible; (e) ordinary wear and tear; (f) defects or damage resulting from the use of Product in conjunction or connection with accessories, products, or ancillary/peripheral equipment not furnished or approved by SAMSUNG; (g) defects or damage resulting from improper testing, operation, maintenance, installation, service, or adjustment not furnished or approved by SAMSUNG; (h) defects or damage resulting from external causes such as collision with an object, fire, flooding, dirt, windstorm, lightning, earthquake, exposure to weather conditions, theft, blown fuse, or improper use of any electrical source; (i) defects or damage resulting from cellular signal reception or transmission, or viruses or other software problems introduced into the Product; or (j) Product used or purchased outside the United States. This Limited Warranty covers batteries only if battery capacity falls below 80% of rated capacity or the battery leaks, and this Limited Warranty does not cover any battery if (i) the battery has been charged by a battery charger not specified or approved by SAMSUNG for charging the battery; (ii) any of the seals on the battery are broken or show evidence of tampering; or (iii) the battery has been used in equipment other than the SAMSUNG phone for which it is specified.