Use this guide to remove or replace the interconnectmain flex cable in the Huawei Mate 20.
Opening the Huawei Mate 20 will '''damage the waterproof sealing''' on the device. If you do not replace the adhesive seals, your phone will '''function normally''' but will '''lose its splash-protection'''.
You’ll need '''replacement adhesive''' to reattach components when reassembling the device.