In a nutshell: This is how I do it. Others MMV
1. Make sure platform-tools are up to date. The latest is 29.0.5. And use a USB A to USB C cable.
2. Download factory image, extract it, extract the image.zip, move boot.img to your phones internal storage.
3. Disable all magisk modules and substratum themes, remove face ID and reboot.
4. Patch the stock boot.img, and move the patched.img to your pc platform-tools folder, then turn phone off.
5. Move all your necessary factory image files to your platform-tools folder: bootloader, radio, the still zipped image.zip and the flash-all.bat file for Windows machines. Using notepad or whatever, edit the flash-all.bat file and remove the -w from the script, leaving a single space between the remaining words, save your edit.
6. Put phone in bootloader mode, and plug it into your pc. Open a command prompt on your platform-tools folder, type in: fastboot devices. If your device is recognized with it's ID, your good to go. Then, what I do is go into my platform-tools folder and double click the flash-all.bat file to start the process. Let it finish, and let your device boot up.
7. Once it boots ok with the update, turn phone off, and go into bootloader mode. Connect to pc, and fastboot the patched boot.img to both slots with..
fastboot flash boot magisk_patched.img --slot=all
And let it boot up with root.
8. Then start enabling your magisk modules a couple at a time. Be warned, sometimes, not all magisk modules play nicely with monthly updates, so take it slow. Luckily, January is cool with the
@Tulsadiver mods, and the Active Edge mods from what I've seen.
9. And there ya go. Ok....so it was a little bigger than a nutshell!