Use this guide to replace a broken rear glass panel on your 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.
Secure a suction handle to the bottom of the back cover, as close to the edge as possible.
If the phone's rear glass is cracked, the suction handle may not stick. Try lifting it with strong tape, or superglue the suction handle in place and allow it to cure so you can proceed.
Lift the back cover with the suction handle to create a small gap between the cover and the frame.
Insert an opening pick into the gap.
If you have trouble, apply more heat to further soften the adhesive. Follow the iOpener instructions to avoid overheating.
Slide the opening pick to the bottom right corner.
Insert a fifth opening pick at the top right corner of the phone.
Slide the opening pick along the right side to cut the remaining adhesive.
Try not to remove the rear glass all the way yet, the fingerprint cable is still connected to the motherboard and rips easily if not handled with care.
Slide an opening pick under the bottom end of the black protective foil that covers the battery. Use the opening pick to loosen the adhesive that attaches the foil to the loudspeaker.
Use an opening pick to carefully pry the flash assembly off the motherboard cover and fold it into the direction of the battery. Avoid damaging the flash assembly flex cable.
Use a spudger to pry up and disconnect the fingerprint flex cable.
Before installing fresh adhesive and reassembling, remove any remaining adhesive from the phone, and clean the glued areas with isopropyl alcohol (>90%) and a lint-free cloth.
During reassembly, this is a good point to power on your phone and test all functions before sealing it up. Be sure to power your phone back down completely before you continue working.
Secure the new back cover with pre-cut adhesive or double-sided adhesive tape. After installing the rear glass, apply pressure for several minutes to help the adhesive form a good bond, such as by placing it under a stack of heavy books.