[GUIDE] Pixel 4 XL "coral": Unlock Bootloader, Update, Root, Pass SafetyNet

Search This thread

V0latyle

Forum Moderator
Staff member
If you are looking for my guide on a different Pixel, find it here:
WARNING: YOU AND YOU ALONE ARE RESPONSIBLE FOR ANYTHING THAT HAPPENS TO YOUR DEVICE. THIS GUIDE IS WRITTEN WITH THE EXPRESS ASSUMPTION THAT YOU ARE FAMILIAR WITH ADB, MAGISK, ANDROID, AND ROOT. IT IS YOUR RESPONSIBILITY TO ENSURE YOU KNOW WHAT YOU ARE DOING.

Prerequisites:


Android Source - Setting up a device for development


  1. Follow these instructions to enable Developer Options and USB Debugging.
  2. Enable OEM Unlocking. If this option is grayed out, unlocking the bootloader is not possible.
  3. Connect your device to your PC, and open a command window in your Platform Tools folder.
  4. Ensure ADB sees your device:
    Code:
    adb devices
    If you don't see a device, make sure USB Debugging is enabled, reconnect the USB cable, or try a different USB cable.
    If you see "unauthorized", you need to authorize the connection on your device.
    If you see the device without "unauthorized", you're good to go.
  5. Reboot to bootloader:
    Code:
    adb reboot bootloader
  6. Unlock bootloader: THIS WILL WIPE YOUR DEVICE!
    Code:
    fastboot flashing unlock
    Select Continue on the device screen.

  1. Install Magisk on your device.
  2. Download the factory zip for your build.
  3. Inside the factory zip is the update zip: "device-image-buildnumber.zip". Open this, and extract boot.img
  4. Copy boot.img to your device.
  5. Patch boot.img with Magisk: "Install" > "Select and Patch a File"
  6. Copy the patched image back to your PC. It will be named "magisk_patched-23xxx_xxxxx.img". Rename this to "master root.img" and retain it for future updates.
  7. Reboot your device to bootloader.
  8. Flash the patched image:
    Code:
    fastboot flash boot <drag and drop master root.img here>
  9. Reboot to Android. Open Magisk to confirm root - under Magisk at the top, you should see "Installed: <Magisk build number>

  1. Before you download the OTA, open Magisk, tap Uninstall, then Restore Images. If you have any Magisk modules that modify system, uninstall them now.
  2. Take the OTA update when prompted. To check for updates manually, go to Settings > System > System Update > Check for Update
  3. Allow the update to download and install. DO NOT REBOOT WHEN PROMPTED. Open Magisk, tap Install at the top, then Install to inactive slot. Magisk will then reboot your device.
  4. You should now be updated with root.

  1. Download the OTA.
  2. Reboot to recovery and sideload the OTA:
    Code:
    adb reboot sideload
    Once in recovery:
    Code:
    adb sideload ota.zip
  3. When the OTA completes, you will be in recovery mode. Select "Reboot to system now".
  4. Allow system to boot and wait for the update to complete. You must let the system do this before proceeding.
  5. Reboot to bootloader.
  6. Boot the master root image (See note 1):
    Code:
    fastboot boot <drag and drop master root.img here>
    Note: If you prefer, you can download the factory zip and manually patch the new boot image, then flash it after the update. Do not flash an older boot image after updating.
  7. Your device should boot with root. Open Magisk, tap Install, and select Direct Install.
  8. Reboot your device. You should now be updated with root.
Note: You can use Payload Dumper to extract the contents of the OTA if you want to manually patch the new boot image. However, I will not cover that in this guide.

Please note that the factory update process expects an updated bootloader and radio. If these are not up to date, the update will fail.
  1. Download the factory zip and extract the contents.
  2. Reboot to bootloader.
  3. Compare bootloader versions between phone screen and bootloader.img build number
    Code:
    fastboot flash bootloader <drag and drop new bootloader.img here>
    If bootloader is updated, reboot to bootloader.
  4. Compare baseband versions between phone screen and radio.img build number
    Code:
    fastboot flash radio <drag and drop radio.img here>
    If radio is updated, reboot to bootloader.
  5. Apply update:
    Code:
    fastboot update --skip-reboot image-codename-buildnumber.zip
    When the update completes, the device will be in fastbootd. Reboot to bootloader.
  6. Boot the master root image (See note 1):
    Code:
    fastboot boot <drag and drop master root.img here>
    Note: If you prefer, you can manually patch the new boot image, then flash it after the update. Do not flash an older boot image after updating.
  7. Your device should boot with root. Open Magisk, tap Install, and select Direct Install.
  8. Reboot your device. You should now be updated with root.
Note: If you prefer, you can update using the flash-all script included in the factory zip. You will have to copy the script, bootloader image, radio image, and update zip into the Platform Tools folder; you will then have to edit the script to remove the -w option so it doesn't wipe your device.
The scripted commands should look like this:
Code:
fastboot flash bootloader <bootloader image name>
fastboot reboot bootloader
ping -n 5 127.0.0.1 > nul
fastboot flash radio <radio image name>
fastboot reboot bootloader
ping -n 5 127.0.0.1 > nul
fastboot update  --skip-reboot --slot=all <image-device-buildnumber.zip>
Once this completes, you can reboot to bootloader and either boot your master patched image, or if you patched the new image, flash it at this time.

  1. Follow the instructions on the Android Flash Tool to update your device. Make sure Lock Bootloader and Wipe Device are UNCHECKED.
  2. When the update completes, the device will be in fastbootd. Reboot to bootloader.
  3. Boot the master root image (See note 1):
    Code:
    fastboot boot <drag and drop master root.img here>
    Note: If you prefer, you can download the factory zip and manually patch the new boot image, then flash it after the update. Do not flash an older boot image after updating.
  4. Your device should boot with root. Open Magisk, tap Install, and select Direct Install.
  5. Reboot your device. You should now be updated with root.

This is my configuration that is passing Safety Net. I will not provide instructions on how to accomplish this. Attempt at your own risk.

Zygisk + DenyList enabled
All subcomponents of these apps hidden under DenyList:
  • Google Play Store
  • GPay
  • Any banking/financial apps
  • Any DRM media apps
Modules:
To check SafetyNet status:
I do not provide support for Magisk or modules. If you need help with Magisk, here is the Magisk General Support thread. For support specifically with Magisk v24+, see this thread.

Points of note:
  • The boot image is NOT the bootloader image. Do not confuse the two - YOU are expected to know the difference. Flashing the wrong image to bootloader could brick your device.
  • While the Magisk app is used for patching the boot image, the app and the patch are separate. This is what you should see in Magisk for functioning root:
    screenshot_20211218-194517-png.5486339
  • "Installed" shows the version of patch in the boot image. If this says N/A, you do not have root access - the boot image is not patched, or you have a problem with Magisk.
  • "App" simply shows the version of the app itself.
  • If you do not have a patched master boot image, you will need to download the factory zip if you haven't already, extract the system update inside it, then patch boot.img.
  • If you prefer updating with the factory image, you can also extract and manually patch the boot image if desired.
  • Some Magisk modules, especially those that modify read only partitions like /system, may cause a boot loop after updating. As a general rule, disable these modules before updating. You are responsible for knowing what you have installed, and what modules to disable.


Credits:
Thanks to @ipdev , @kdrag0n , @Didgeridoohan , and last but not least, @topjohnwu for all their hard work!
 
Last edited:

dortok

Senior Member
Jan 22, 2010
483
32
Toronto
I can pass SafetyNet but GPay does not allow contactless. The only thing unclear is what settings you used from MagiskHide Props Config. Can you please share?
 

V0latyle

Forum Moderator
Staff member
I thought the purpose of MHPC is to easily change the prop settings to another device. Does it even do anything by just installing the module?
I'm not sure, I've never messed with anything under the hood, and honestly I didn't install it myself - I'm not sure how it got installed. Other users have mentioned success using only USNF.
 

Top Liked Posts

  • There are no posts matching your filters.
  • 5
    If you are looking for my guide on a different Pixel, find it here:
    WARNING: YOU AND YOU ALONE ARE RESPONSIBLE FOR ANYTHING THAT HAPPENS TO YOUR DEVICE. THIS GUIDE IS WRITTEN WITH THE EXPRESS ASSUMPTION THAT YOU ARE FAMILIAR WITH ADB, MAGISK, ANDROID, AND ROOT. IT IS YOUR RESPONSIBILITY TO ENSURE YOU KNOW WHAT YOU ARE DOING.

    Prerequisites:


    Android Source - Setting up a device for development


    1. Follow these instructions to enable Developer Options and USB Debugging.
    2. Enable OEM Unlocking. If this option is grayed out, unlocking the bootloader is not possible.
    3. Connect your device to your PC, and open a command window in your Platform Tools folder.
    4. Ensure ADB sees your device:
      Code:
      adb devices
      If you don't see a device, make sure USB Debugging is enabled, reconnect the USB cable, or try a different USB cable.
      If you see "unauthorized", you need to authorize the connection on your device.
      If you see the device without "unauthorized", you're good to go.
    5. Reboot to bootloader:
      Code:
      adb reboot bootloader
    6. Unlock bootloader: THIS WILL WIPE YOUR DEVICE!
      Code:
      fastboot flashing unlock
      Select Continue on the device screen.

    1. Install Magisk on your device.
    2. Download the factory zip for your build.
    3. Inside the factory zip is the update zip: "device-image-buildnumber.zip". Open this, and extract boot.img
    4. Copy boot.img to your device.
    5. Patch boot.img with Magisk: "Install" > "Select and Patch a File"
    6. Copy the patched image back to your PC. It will be named "magisk_patched-23xxx_xxxxx.img". Rename this to "master root.img" and retain it for future updates.
    7. Reboot your device to bootloader.
    8. Flash the patched image:
      Code:
      fastboot flash boot <drag and drop master root.img here>
    9. Reboot to Android. Open Magisk to confirm root - under Magisk at the top, you should see "Installed: <Magisk build number>

    1. Before you download the OTA, open Magisk, tap Uninstall, then Restore Images. If you have any Magisk modules that modify system, uninstall them now.
    2. Take the OTA update when prompted. To check for updates manually, go to Settings > System > System Update > Check for Update
    3. Allow the update to download and install. DO NOT REBOOT WHEN PROMPTED. Open Magisk, tap Install at the top, then Install to inactive slot. Magisk will then reboot your device.
    4. You should now be updated with root.

    1. Download the OTA.
    2. Reboot to recovery and sideload the OTA:
      Code:
      adb reboot sideload
      Once in recovery:
      Code:
      adb sideload ota.zip
    3. When the OTA completes, you will be in recovery mode. Select "Reboot to system now".
    4. Allow system to boot and wait for the update to complete. You must let the system do this before proceeding.
    5. Reboot to bootloader.
    6. Boot the master root image (See note 1):
      Code:
      fastboot boot <drag and drop master root.img here>
      Note: If you prefer, you can download the factory zip and manually patch the new boot image, then flash it after the update. Do not flash an older boot image after updating.
    7. Your device should boot with root. Open Magisk, tap Install, and select Direct Install.
    8. Reboot your device. You should now be updated with root.
    Note: You can use Payload Dumper to extract the contents of the OTA if you want to manually patch the new boot image. However, I will not cover that in this guide.

    Please note that the factory update process expects an updated bootloader and radio. If these are not up to date, the update will fail.
    1. Download the factory zip and extract the contents.
    2. Reboot to bootloader.
    3. Compare bootloader versions between phone screen and bootloader.img build number
      Code:
      fastboot flash bootloader <drag and drop new bootloader.img here>
      If bootloader is updated, reboot to bootloader.
    4. Compare baseband versions between phone screen and radio.img build number
      Code:
      fastboot flash radio <drag and drop radio.img here>
      If radio is updated, reboot to bootloader.
    5. Apply update:
      Code:
      fastboot update --skip-reboot image-codename-buildnumber.zip
      When the update completes, the device will be in fastbootd. Reboot to bootloader.
    6. Boot the master root image (See note 1):
      Code:
      fastboot boot <drag and drop master root.img here>
      Note: If you prefer, you can manually patch the new boot image, then flash it after the update. Do not flash an older boot image after updating.
    7. Your device should boot with root. Open Magisk, tap Install, and select Direct Install.
    8. Reboot your device. You should now be updated with root.
    Note: If you prefer, you can update using the flash-all script included in the factory zip. You will have to copy the script, bootloader image, radio image, and update zip into the Platform Tools folder; you will then have to edit the script to remove the -w option so it doesn't wipe your device.
    The scripted commands should look like this:
    Code:
    fastboot flash bootloader <bootloader image name>
    fastboot reboot bootloader
    ping -n 5 127.0.0.1 > nul
    fastboot flash radio <radio image name>
    fastboot reboot bootloader
    ping -n 5 127.0.0.1 > nul
    fastboot update  --skip-reboot --slot=all <image-device-buildnumber.zip>
    Once this completes, you can reboot to bootloader and either boot your master patched image, or if you patched the new image, flash it at this time.

    1. Follow the instructions on the Android Flash Tool to update your device. Make sure Lock Bootloader and Wipe Device are UNCHECKED.
    2. When the update completes, the device will be in fastbootd. Reboot to bootloader.
    3. Boot the master root image (See note 1):
      Code:
      fastboot boot <drag and drop master root.img here>
      Note: If you prefer, you can download the factory zip and manually patch the new boot image, then flash it after the update. Do not flash an older boot image after updating.
    4. Your device should boot with root. Open Magisk, tap Install, and select Direct Install.
    5. Reboot your device. You should now be updated with root.

    This is my configuration that is passing Safety Net. I will not provide instructions on how to accomplish this. Attempt at your own risk.

    Zygisk + DenyList enabled
    All subcomponents of these apps hidden under DenyList:
    • Google Play Store
    • GPay
    • Any banking/financial apps
    • Any DRM media apps
    Modules:
    To check SafetyNet status:
    I do not provide support for Magisk or modules. If you need help with Magisk, here is the Magisk General Support thread. For support specifically with Magisk v24+, see this thread.

    Points of note:
    • The boot image is NOT the bootloader image. Do not confuse the two - YOU are expected to know the difference. Flashing the wrong image to bootloader could brick your device.
    • While the Magisk app is used for patching the boot image, the app and the patch are separate. This is what you should see in Magisk for functioning root:
      screenshot_20211218-194517-png.5486339
    • "Installed" shows the version of patch in the boot image. If this says N/A, you do not have root access - the boot image is not patched, or you have a problem with Magisk.
    • "App" simply shows the version of the app itself.
    • If you do not have a patched master boot image, you will need to download the factory zip if you haven't already, extract the system update inside it, then patch boot.img.
    • If you prefer updating with the factory image, you can also extract and manually patch the boot image if desired.
    • Some Magisk modules, especially those that modify read only partitions like /system, may cause a boot loop after updating. As a general rule, disable these modules before updating. You are responsible for knowing what you have installed, and what modules to disable.


    Credits:
    Thanks to @ipdev , @kdrag0n , @Didgeridoohan , and last but not least, @topjohnwu for all their hard work!
    1
    Thanks for the guide, im currently on android 12, planing to downfgrade to Android 11, will be ok to follow the Master Root guide to patch, downgrade and root at the same time to Android 11?
    1
    Thanks for the guide, im currently on android 12, planing to downfgrade to Android 11, will be ok to follow the Master Root guide to patch, downgrade and root at the same time to Android 11?
    Yep.