The Xiaomi Mi 6 is splash resistant, but what gives it that resistance? And why isn't it rated for full water resistance? The best way to find that out is to take the phone apart. And while he was at it, JerryRigEverything also stripped the back glass of paint to show off the internals of the phone. It seems that Xiaomi got 90% of the way there to waterproofing the Mi 6. The SIM slot has a rubber seal, there's no headphone jack and every speaker and mic grille have special mesh screens that keep water out. The one hole that's left wide open is the USB-C port - there's no waterproofing on...
Source: http://www.gsmarena.com/xiaomi_mi_6_teardown_almost_waterproof-news-25075.php
