update Android 12 and magisk ROOT on Pixel4

Preface:This article is written for me.

Uninstall root from magisk

• open magisk
• press “uninstall Magisk”
• press RESTORE IMAGES

-Then one can update to android 12 in his/her setting

ROOT again

• If one doesn’t have adb, download at link_1

• unpack it and open a terminal then cd into folder which contains “adb.exe”

• plug your phone

• code:

adb devices

like:

if it shows empty, check if your wire can transfer datas

• check device system version

search in google to find the suitable factory image, example of me:“SP1A.10812.O15”

• Download the factory image and extract boot.img from it.
  (Inside the downloaded zip-file is another zip file containing the boot image)

• Copy the extracted boot.img to your phone and open the magisk app.

• Click on Install -> Select and Patch a File and let it do its magic.

• Copy the magisk-patched boot image that should be found in your phones download folder back to your PC.

• plug your phone
  type:

adb reboot bootloader
#	wait until opend fastboot mode
fastboot flash boot XXX.img

• then reboot, root finished