Surely this applies to the S7 Active. Straight from the horse's mouth.
What the IP68 Standard Means
The International Electrotechnical Commission measures the degree of protection provided by enclosures, or “IP code.” IP68 means that a device must be completely dust tight, and protected against water to a maximum of 1.5 meters for 30 minutes.
For the Galaxy S7 and Galaxy S7 edge, now the entire device is completely water and dust resistant, even the open connection slots, like for the charger and headphones. Previous Galaxy devices required a cap to cover the USB slot, battery cover and other openings, to shield them from water and dust. But that additional cover caused some complaints from consumers about the added bulk and the inconvenience of attaching and detaching the cover when charging and transfering data.
An exclusive type of water protective tape has been applied to the front and rear glass and other parts of the Galaxy S7 and Galaxy S7 edge, while the use of anticorrosive materials and a corrosion-preventing coating for exposed parts on the exterior
ensure these Galaxy smartphones are completely protected from water.
The microphone needs to be able to receive sound clearly, so it is protected with portable electronics vents, which allows for a good flow of air and the outflow of humidity to prevent moisture from entering the device.
Improving Processes to Get Certification
Even with all of those advancements in the latest Galaxy models, getting the demanding IP68 certification required improved process controls, including for the management of individual parts, the systemization of the assembly process and thorough quality control.
Finally, due to those many advances, improvements and changes made throughout the development process, the Galaxy S7 and Galaxy S7 edge received IP68 certification. It required relentless efforts from Samsung to make the innovations necessary to earn that rating, but the benefits of having devices well protected from dust and water made it all worthwhile.
https://news.samsung.com/global/water-and-dust-protection-in-a-streamlined-form-the-ip68-feature-of-the-galaxy-s7-and-galaxy-s7-edge