Ever wonder how water-resistant smarphones stop water from coming in even after having so many open ports?
May be you thought about it once, but here we will share every detail on how these actually works. It is hard to believe that a phone with so many vulnerable parts like charger port, 3.5mm headphone jack connector, speakers, sensors, screen and many more. As far as water concerned, it is impossible to stop it from flowing in. But Apple, Samsung and Sony tells its customers that there new smartphone iPhone 7 , Samsung Galaxy 7 and Sony Xperia XZ is completely water-resistant. It is a great feature or may be I should say an invention which saves our phone if we accidentally drops it in a water tub or expose it under rain. We actually saves alot of money and can also be relaxed while using the device. So here again the question rises, How this giants manage to stop water from coming in ?
iFixit teardown engineer Scott Havard reveals that the top phone manufacturing companies is just using glue. It might be surprising for many people but yes, they use alot of glue. If you teardown a water-resistant smartphone you will see a thick, sticky substance used to seal the glass to the chasis. Though a glue cannot be applied in some areas to maintain the phones look. So they use rubber gaskets (little O-rings which which press up against the inside of the device)
Phone's headphone jack and charging ports are sealed with rubber rings and you can see a rubber gasket around sim card tray. For buttons, a little boot of silicon rubber is used which completely seperates the physical part you push from the electrical contacts inside.
The engineer also have to keep in mind that they can't make the phone airtight while making it watertight. There are speakers which produce sound by creating vibrations, so they use a incredibly fine mesh in front of speakers and microphones prompting the water to follow its natural tendency through cohesion and surface tension to "stick to itself" rather than passing through, instead of just a mesh, they add a water-resistant, breathable fabric membrane (ePTFE) to let air through and equalize the pressure. and also they have to maintain the pressure inside the phone which might not be equal to the outside, creating an opportunity for that pressure to breach the phone's seals and let water in.
Did you notice this before, that the water-resistant smartphone maker never tell that their phone is waterproof. Confused? There is a difference between water resistant and waterproof. There is nothing like waterproof in the smartphone arena. Your phone can stop water till some point, if you sit with your phone underwater for waters, then its time for you to get a new phone. So if you are planning to take your phone for swimming, we must say that is a very bad idea.
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