The Huawei Mate 10 and Mate 10 Pro share many of their features so it's not surprising to see a common design on the inside. The vanilla phone seems to a rubber gasket on the back cover, which should offer a solid level of water resistance, but the phone is rated only for IP54. There seems to be a rubber ring around the USB-C port, even the card tray has one. Huawei Mate 10 teardown Compare that to the Huawei Mate 10 Pro. You can clearly see the rubber ring around the USB-C port on the bottom and the card tray (there's no headphone jack). It's not entirely clear what...
Source: https://www.gsmarena.com/huawei_mate_10_and_mate_10_pro_teardown-news-28108.php
