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Homeboy76

Senior Member
Aug 24, 2012
2,803
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[Guide] Root Pixel 4a (5G) Android 12 Unlock/Lock Bootloader + Systemless ROOT
Android Security Bulletin—December 2021
Pixel Update Bulletin—December 2021

Introduction
This Guide is for Pixel 4a 5(G) owners that want to Root their phone, and enjoy the benefits of rooting it without installing a Custom ROM. However, for those that just can't live without a Custom ROM, take a look at 'Custom ROMs for Pixel 4a 5(G)'.

NEW
  1. Magisk Modules for Magisk Alpha/Canary
  2. Magisk Alpha (vvb2060)


Update(s)
  1. Factory/OTA Images - 06/12
  2. Magisk Stable - Magisk-23.0 05/12
  3. Magisk Beta - Magisk-23.0 05/12
  4. Magisk Canary - Magisk-2301x
  5. TWRP - Waiting for T.R.W.P. for Android 12
  6. SafetyNet - SafetyNetFix v2.2.0
  7. SDK Platform-tools - r31.0.3 08/18
  8. Custom Kernels
    • Waiting . . .
  9. Custom ROMs
    • ProtonAOSP[12] 11/01

Disclaimer
  1. I assume no responsibility for the malfunctioning/bricking of your phone.
  2. The order of listed items i.e., Custom Kernels, Custom ROMS, etc. Does not indicate my preference for them. It is your responsibility to do the research before selecting an item.

Prerequisites
  1. A Pixel 4a 5(G) phone with an unlocked bootloader.
  2. The latest Android Factory or OTA Image: "bramble" for Pixel 4a 5(G)

    Factory Image

    OTA Image
  3. A Computer with the latest SDK Platform-Tools: r31.0.3 installed.
    • Important: Update Platform Tools, regularly, for optimal performance.

Other Guides

Credits/Thanks/Recognitions
  1. @creezalird- Flash Android 12 factory image.
  2. Those I may have, inadvertently, forgotten.

Index
(NOTE: Numbers 1-11 are not steps, they are individual sets of instructions).
  1. Open a Command Prompt/Boot Fastboot Mode/Boot Recovery

    • Open a Command Prompt on Computer
      1. Open File Explorer, click the platform-tools folder ==> click the folder icon (left side of address bar) to highlight it type cmd and press enter.
      2. Open a Powershell Command Prompt on Computer: Open File Explorer, click the platform-tools folder ==> click the folder icon (left side of address bar) to highlight it type powershell and press enter.
      3. Notes:
        • Enable USB Debugging, on your phone: Settings ==> System ==> Advanced ==> Developer options ==> Scroll down to USB debugging and enable it.
        • When using the Powershell Command Prompt Commands must be preceeded with ./: i.e, ./fastboot devices
        • If you do not want to open a Command Prompt every time you want to use the fastboot command, add the path to the Platform-tools folder to Windows environment variables.
    • Boot fastboot mode (bootloader):
      • Power off phone, press and hold the power and volume down buttons until you see Start.
    • Boot Recovery
      • Power off phone, press and hold the power and volume down buttons until you see Start. Use volume up/down button until you see Recovery mode. Press power button.
  2. Test fastboot

    • Enable Developer Options - Tap Settings > About phone > Build number 7 times or until you should see 'you are a Developer'.
    • Enable USB Debugging - Tap Settings > System > Advanced > Developer options >
      Enable USB Debugging.
    • Open a Command Prompt on your computer in the Platform-tools folder.
    • Boot fastboot mode on your phone (#1)
    • Connect the phone to the Computer.
    • At the prompt type: fastboot devices to verify communication with phone. It should return your phone's serial number.
  3. Unlock Bootloader/Return Phone to Stock/Lock Bootloader

    • Unlock Bootloader

      1. This will erase all user data from the device!
      2. Backup your data
      3. Activate Developer Options: Tap Settings > About Phone > Tap Build Number 7 times or until you see you are a Developer. Tap back > System > Advanced > Developer Options. Enable OEM Unlock and, USB Debugging.
      4. Boot fastboot mode
      5. Connect the phone to the Computer with USB cord.
      6. Open a Command Prompt on your computer and type fastboot flashing unlock and press enter.
      7. You should see a request for confirmation on your phone, use the volume keys to scroll and the power key to select.
      8. Allow the process to complete and then type fastboot reboot at the Command Prompt and press enter.
      9. When your phone reboots disconnect your usb cable.
        Notes: After unlocking your bootloader, you'll see a warning: The bootloader is unlocked and... You will see this warning until, you relock the bootloader.
        Do not relock your bootloader until you have returned the device to Stock.
    • Return Phone to Stock

      1. Backup your data/Internal storage
      2. Settings > System > Advanced > Reset Options > Erase all data (factory reset)
      3. Log in
      4. Set up phone
    • Lock Bootloader

      1. Return the phone to Stock before locking the bootloader, failure to do so could brick your phone
      2. This will erase all user data from the device!
      3. Boot fastboot mode
      4. Open a Command Prompt and type this at the Prompt: fastboot flashing lock
      5. You should see a request for confirmation on your phone, use the volume keys to scroll and the power key to select.
      6. Allow the process to complete, then type this at the Command Prompt: fastboot reboot
      7. Enable Developer Options: Settings > About phone > Tap Build number 7 times or until you see 'you are a developer'.
      8. Tap Back > Developer options and toggle OEM Unlock off.
  4. Install/Update Factory Image keep data or wipe data

    • Important Note(s):
      1. If you are upgrading your phone to Android 12 a wipe is, absolutely necessary, if you want to root your phone after the upgrade. Subsequent factory image updates do not require a wipe.
      2. If you are updating your phones firmware (factory image) and your phone was rooted: Disable all magisk modules and restore back Magisk app name if you hid it and reboot. Why? The magisk modules you are using may need updating to work with the updated firmware. Incompatiable modules cause bootloops. :(
      3. Always verify you have the latest version of SDK Platform-Tools installed on your computer before installing the Factory Image: Pixel 4a 5(G) - bramble.
      4. If you get an error: while flashing, try one of these options:
        • Change the USB port to a non charging USB port.
        • Change the USB cord.
        • Change Computers.
      5. Backup your data
      6. Download the latest Factory Image: Pixel 4a 5(G) - bramble to your Computer.
      7. Extract the factory Image to a folder.
    • Flash Factory Image Keep Data

      • Open the folder you extracted the Factory Image to and Edit the flash-all.bat file with a file editor i.e., DroidEdit app.
        1. Change this line: fastboot -w update image-bramble-aa9a.999999.999.zip
        2. to this: fastboot --disable-verity --disable-verification update image-bramble-sp1a.999999.999.zip
        3. Note: If you do not remove the -w your internal storage will be wiped.
      • After, you have edited the flash-all.bat file. Copy/Move these files to the Platform-tools folder:
        1. bootloader-bramble-....img
        2. flash-all.bat
        3. image-bramble-....zip
        4. radio-bramble-....img
      • Open a Command Prompt on your computer in the Platform-tools folder and type: flash-all at the Command Prompt and press enter.
      • The phone will reboot when flashing is complete.
      • Go-to 7. Root/Reroot with Magisk and Pass SafetyNet, • Patching the boot.img - to root/reroot.
    • Flash Factory Image Wipe Data

      • Open the folder you extracted the Factory Image to and Edit the flash-all.bat file with a file editor i.e., DroidEdit app.
        1. Change this line: fastboot -w update image-bramble-aa9a.999999.999.zip
        2. to this: fastboot -w --disable-verity --disable-verification update image-bramble-sp1a.999999.999.zip
        3. This will wipe your phone's Internal Storage.
      • Open the folder you extracted the Factory Image to and Copy/Move these files to the Platform-tools folder:
        1. bootloader-bramble-....img
        2. flash-all.bat
        3. image-bramble-....zip
        4. radio-bramble-....img
      • Open a Command Prompt on your computer in the Platform-tools folder and type: flash-all at the Command Prompt and press enter.
      • The phone will reboot when flashing is complete.
      • Setup phone
      • Enable Developer Mode and USB Debugging
        1. Setup => About phone => Tap Build number 7 times or untill you see you are a 'Developer'.
        2. Setup => System => Developer options => Enable Developer options => enable USB Debugging
      • Go-to 7. Root/Reroot with Magisk and Pass SafetyNet, • Patching the boot.img - to root/reroot.
  5. ADB Sideload

  6. Extract/Flash boot.img

    • Extract boot.img

      1. Download the latest Factory image to your phone.
      2. Extract the Factory Image file (bramble-r2d1a.999999.999-factory-99a9a99a.zip) to a folder.
      3. Open the folder and, extract the Image file (image-bramble-aa9a.999999.999.zip) into the folder.
    • Flash boot.img

      1. Flashing the boot.img removes root.
      2. Open the folder you extracted the 'image...zip' file to and copy the boot.img file to your computer's platform-tools folder or to the folder that has fastboot.exe in it.
      3. Boot fastboot mode
      4. Connect the phone to the Computer
      5. Open a Command Prompt and type the following command at the prompt:
        fastboot flash boot --slot all boot.img
      6. Reboot
  7. Root/Reroot with Magisk and Pass SafetyNet.

    • Android 12

      1. Upgrading to Android 12 and rooting your phone
        • OP, Index, 4. Install/Update Factory Image keep data or wipe data
      2. You wiped your phone when upgraded to Android 12. You want to update the factory image and re-root it.
        • OP, Index, 4. Install/Update Factory Image keep data or wipe data
    • Patching the boot.img - to root/reroot.

      1. Do #6 - Extract boot.img
      2. Install Magisk Canary 23015
        Note: Tap 3 dot menu across from canary => Download, app-debug.apk
      3. Open Magisk Canary App
      4. Set the Update Channel Canary.
      5. Tap Install (next to Magisk)
      6. Tap, Select and Patch a File
      7. Select the boot.img file you extracted from the latest factory image.
      8. Tap the ✓ (Check Mark)
      9. Tap Let's Go
      10. When you see done, the boot.img has been patched (magisk_patched_xxxxxx.img), and stored in the download folder.
      11. Reboot
      12. Copy the patched boot.img file to your computer's Platform-tools folder or the folder that has fastboot.exe in it.
      13. Boot fastboot mode
      14. Connect the phone to the Computer with USB cord.
      15. Open a Command Prompt in the folder you copied the patched boot.img to.
      16. Type fastboot flash boot "name of patched boot".img without the quote marks at the Prompt and press enter.
      17. Type fastboot reboot at the Prompt and press enter.
      18. Important Notes: If your phone boot loops try one of the following options:
        • Flash the 'stock' boot.img to both slots: fastboot flash boot boot.img --slot all
        • Boot Safe Mode - Press Power Off button ==> Press Power Off until you see boot Safe Mode ==> Press Ok.
    • Pass Safety Net with SafetyNet Fix 2.2.0

      1. Download File(s)
      2. Install SafetyNet Fix 2.2.0
        • Open Magisk
        • Tap Modules icon
        • Tap Install from storage
        • Navigate to the SafetyNetFix file you downloaded
        • Tap the SafetyNetFix file
        • Tap the check mark (✓ at the bottom) to start the installation.
        • After it installs tap the Save icon to save the log
        • Tap Reboot.
      3. Settings for Magisk Canary 23015
        • Open Magisk App
        • Tap the Setup icon.
        • Scroll down to App and set the Update Channel to Canary.
        • Scroll down to Check Updates and enable it.
        • Scroll down to Magisk and enable Zygisk and Enforce DenyList.
        • Tap Configure DenyList => Tap 3 Dot Menu => Check ✓ Show system apps => Check ✓ Google Play Store, Google Pay, etc.
        • Scroll down to Superuser and enable Enable Biometric Authentication.
      4. Get Device Certified Clear Google Play Services, Google Play Store, Google Pay, etc. data
        • Turn Airplane mode on
        • Open Settings
        • Tap Apps & notifications
        • Tap see all...
        • Tap three dot menu
        • Tap Show system
        • Scroll down to Google Play Store
        • Tap Storage and Cache
        • Tap Clear storage
          Note: Repeat the 3 steps above for Google Play Services, Google Pay, etc.
        • reboot
        • Turn Airplane mode off
      5. Check Device Certification
        • Open Google Play Store app
        • Tap Menu - Circle top right
        • Tap Settings
        • Tap About
        • Check Play protect certification.
  8. Set Magisk App Update Channel/Update Magisk

    • Set Magisk App Update Channel

      • Open Magisk App > Tap Settings icon > Update Channel > Select Stable, Beta, Canary or Custom.
    • Update Magisk

      1. When Magisk App notifies you of an update:
      2. Tap install.
      3. Select, Direct Install (Recommended)
      4. When it finishes installing
      5. Tap, Save Log
      6. Log location: /storage/emulated/0/Download
      7. Tap, Reboot
      8. Done!
  9. Custom ROMs

    • Need help with a Custom ROM?
      • First, read and follow the Installation Instructions. The installation instructions are in the OP.
      • Second, if you have a problem Installing it, Search the thread of the Custom ROM you are trying to install for a solution to problem: If you don't find a solution post your request for help on the thread.
    • ROMs
      • Alpha/Beta

        • None
      • Official
      • Unofficial

        • None
  10. Apps/Mods/Scripts/Tethering/Themes
  11. T.W.R.P. Backup/Restore

    • Waiting for Android 12 T.W.R.P.
 

Attachments

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Last edited:

rmckay1763

Member
May 24, 2018
6
1
As this is my first device that supports unlocking the bootloader, before I proceed with root, I want to make sure I can return to stock with a locked bootloader if desired. Based on my understanding of the directions, 1) wipe phone 2) flash stock image 3) relock bootloader will safely return the phone to its original state after rooting and/or installing a custom rom. Am I understanding correctly? Thanx.
 

Homeboy76

Senior Member
Aug 24, 2012
2,803
1,414
As this is my first device that supports unlocking the bootloader, before I proceed with root, I want to make sure I can return to stock with a locked bootloader if desired. Based on my understanding of the directions, 1) wipe phone 2) flash stock image 3) relock bootloader will safely return the phone to its original state after rooting and/or installing a custom rom. Am I understanding correctly? Thanx.
Do #3 Return to stock
 
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kha1rul

Senior Member
Sep 28, 2010
56
5
London
Just unlocked the bootloader on my 4a 5G and I'd like to ADB Push all sdcard files from my old phone to the 4a 5G before I do the initial setup. Is this possible?

Command Prompt tells me adb is unauthorized (was authorized until I unlocked the bootloader).
 

Homeboy76

Senior Member
Aug 24, 2012
2,803
1,414
Just unlocked the bootloader on my 4a 5G and I'd like to ADB Push all sdcard files from my old phone to the 4a 5G before I do the initial setup. Is this possible?

Command Prompt tells me adb is unauthorized (was authorized until I unlocked the bootloader).
Do you have the latest SDK Platform-tools?
There is a link in the OP - Prerequisites , if you need to update it.
 
Last edited:

Homeboy76

Senior Member
Aug 24, 2012
2,803
1,414
@LastQuestion
If your phone had root and you did #4 'Keep data' to install the latest factory image. Your bootloop is probably caused by a rouge Magisk module.
That is why I, always, recommend uninstalling Magisk before installing/updating the factory image.

Do you have the latest SDK Platform-tools r 30.0.5? If not, there is s link in the OP - Prerequisites to get the latest SDK Platform-tools.

Have you tried flashing the stock boot.img to both slots to stop the bootloop?
fastboot flash boot --slot all boot.img

If flashing the stock boot.img stops the bootloop and your phone boots.
- boot Safe Mode
- Reboot - To remove all residual files, Magisk modules, etc.
- If your phone has the latest factory image do #7 to root/reroot. Otherwise, Do #4 'keep data', then do #7 to root/reroot.
 
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Homeboy76

Senior Member
Aug 24, 2012
2,803
1,414
Last edited:
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kha1rul

Senior Member
Sep 28, 2010
56
5
London
@kha1rul
Ok!
I never used adb push files from and old device to a new device.
What is your old device?
Maybe one of these links will help:
- ADB Android Device Unauthorized
- ADB Android Device Unauthorized
Or
You could copy the files from your old device to your computer. Then copy them from your computer to your Pixel 4a (5)

I shouldn't matter how you transfer the files as long as you get the files transfered.:)

I wanted to push because it's much more reliable and faster than MTP.

Regarding my previous dilemma, I made a noob mistake, didn't press power+UP to get into recovery!
Even so, problem is it seems that stock recovery only allows sideload, not push, if I'm not mistaken?
So I decided to set up the device and install the apps, and THEN do adb push.

The problem I have now is that there are certain files which can't be pushed for permission reasons, and the whole operation then stops. Is there a way to get adb to simply skip those files and only do the ones it can?
 
Last edited:

Homeboy76

Senior Member
Aug 24, 2012
2,803
1,414
I wanted to push because it's much more reliable and faster than MTP.

Regarding my previous dilemma, I made a noob mistake, didn't press power+UP to get into recovery!
Even so, problem is it seems that stock recovery only allows sideload, not push, if I'm not mistaken?
So I decided to set up the device and install the apps, and THEN do adb push.

The problem I have now is that there are certain files which can't be pushed for permission reasons, and the whole operation then stops. Is there a way to get adb to simply skip those files and only do the ones it can?
¯\_(ツ)_/¯
 

lu270bro

Senior Member
Aug 3, 2010
124
22
Maryville, TN
Thanks for the write-up. Just got one of these as I dropped my old phone, and I was due anyways. So question regarding Safetynet. I went ahead and went with the latest Feb factory image, patched the boot and rooted with Magisk, then tried the safety net and attestation fails. Anybody have the feb patch and passing safetynet? if so what was the sequence you used? thanks
 

gladi8r

Senior Member
Jul 13, 2011
138
50
Las Vegas
Google Pixel 4a 5G
Thanks for the write-up. Just got one of these as I dropped my old phone, and I was due anyways. So question regarding Safetynet. I went ahead and went with the latest Feb factory image, patched the boot and rooted with Magisk, then tried the safety net and attestation fails. Anybody have the feb patch and passing safetynet? if so what was the sequence you used? thanks

You need Universal Safetynet fix v 1.1.1 Magisk module.
 

Homeboy76

Senior Member
Aug 24, 2012
2,803
1,414
Thanks for the write-up. Just got one of these as I dropped my old phone, and I was due anyways. So question regarding Safetynet. I went ahead and went with the latest Feb factory image, patched the boot and rooted with Magisk, then tried the safety net and attestation fails. Anybody have the feb patch and passing safetynet? if so what was the sequence you used? thanks
- Root with Magisk patched img
- Open Magisk Manager install SafetyNet module
- Reboot
- Open Magisk Manager Enable Magisk hide
- Hide Google Play store, Google pay, etc
- Clear cache and storage for the above apps
- Reboot
 

lu270bro

Senior Member
Aug 3, 2010
124
22
Maryville, TN
- Root with Magisk patched img
- Open Magisk Manager install SafetyNet module
- Reboot
- Open Magisk Manager Enable Magisk hide
- Hide Google Play store, Google pay, etc
- Clear cache and storage for the above apps
- Reboot
yeah, im an idiot, got it sorted before i seen your post but thank you tho. stupid freakin basic crap.......i never did magisk hide and have it repackaged. I did have to use the universal zip, but once i did all that, worked perfect. but again, thank you very much
 

Natakranta

Senior Member
Mar 19, 2013
3,225
6,158
Dublin
Just unlocked the bootloader on my 4a 5G and I'd like to ADB Push all sdcard files from my old phone to the 4a 5G before I do the initial setup. Is this possible?

Command Prompt tells me adb is unauthorized (was authorized until I unlocked the bootloader).
Not sure if you still need it, but might be usefule for others.
Unlocking bootloader wipes everything including ADB prompt for your computer. You need to boot system, open developer options , enable ADB debugging and grant access to your computer again when the little popup window appears.
 

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  • 1
    Hello all, Pixel 4a5G on Xfinity Mobile. I was perfectlty rooted on v11 but decided to install the latest v12.0.0 (SP1A.211105.002.A1) Nov 2021 Verizon, Verizon MVNOs>
    Tried to root via Magisk only to fail multiple times. I thought I bricked my phone as it was stuck in recovery but got int to boot again. I tried doing it like I did in V11 but have discovered that this no longer works
    Installed Magisk
    Extracted Boot.img
    Patched Boot.img with Magisk and renamed to magisk_patched_boot.img
    Extracted vbmeta.img
    Placed both files in on PC in my ADB folder
    Disabled AVB and DM Verify via fastboot flash --disable-verity --disable-verification vbmeta vbmeta.img
    Flashed patched boot.img via fastboot flash boot magisk_patched_boot.img
    Rebooted and it is stuck in bootloader

    What am I doing worng. Does it have to do anything with the Nov 2021 security updates. At this point I'm thinking about going back to 11.
    Thanks in advance
    BB
    The first time you upgrade to Android 12 you must wipe your phone in addition to disabling verity and permission to root it.

    Read the Notes in #4, then do #4 'Wipe data'.
    1
    The first time I tried to upgrade I did not wipe the data nor did I disable Magisk. I downloaded the latest build, extrated the boot.img file, patched it with Magisk and re-insertedit the now patched boot.img inside the zip and did a flash-all.bat without wipe (removed -w inside the bat file). That's what started this big Ol' mess. This method worked before but not today, thanks google, LOL!
    Regardless I am currently on the latest build. I just did a fresh install via adb flash-all.bat WITH wipe.
    Again I never disabled Magisk but that was like 2 or 3 flashes ago.
    Should I be good now or do I need to do something more.
    Thanks
    BB

    EDIT: I noticerd in part 4 it says:
    change fastboot -w update image-bramble-aa9a.999999.999.zip
    to fastboot -w --disable-verity --disable-verification update image-bramble-sp1a.999999.999.zip
    I did NOT change this command
    Can I just run fastboot flash --disable-verity --disable-verification vbmeta vbmeta.img
    Or should I do another flash. If I do another flash should I do wipe again or not?
    Thanks
    You need to change this line in the flash-all.bat file:
    [B]fastboot -w update image-bramble-sp1a.999999.999.zip[/B]
    to this:
    [B]fastboot -w --disable-verity --disable-verification update image-bramble-sp1a.999999.999.zip[/B]

    Wiping the phone is necessary if you want to root your phone.

    You do not need to flash the vbmeta.img: [B]fastboot flash --disable-verity --disable-verification vbmeta vbmeta.img[/B]

    Just flashing the vbmeta.img will not allow you to root your phone.
    1
    Thank you.
    One more question. After doing the above and install Magisk when I need to flash the patched boot.img do I do it as normal or do I first need to flash the vbmeta.img:
    fastboot flash --disable-verity --disable-verification vbmeta vbmeta.img
    Thanks Again.
    BB
    Normal:
    fastboot flash boot magisk_patched_...img
    fastboot reboot

    You do not need to flash the vbmeta.img.
    1
    THANK YOU!!!
    It has been quite the journey but my phone is working with root. Now to tackle safety net.
    Magisk 23014, enable Zygisk and enable DenyList on all components of Google Play Services and Google Play Store. Install Universal SafetyNet Fix 2.2.0.

    Done.
    1
    Currently Canary 23015 and Safety Net Fix 2.2.0
    Something weird though is that the modules installed are showing but the modules you can choose and search for are not showing in Magisk. I only run 3 modules that I have backups for so no issue for me at least not yet.

    EDIT: Oh crap I WAS on Platform Tools 30.0.5, Oops I wonder if that was the issue for all the problems.
    PLEASE tell me I don;t have to do this again, LOL!
    I have a spare P3aXL that I am going to do put 12 on. See if it will go smoother with the new Platform Tools
    An old SDK Platform-tools definitely was part of the problem.

    If you want to install modules, install this:
    Fox Magisk Module Manager: 0.1.2 (FoxMmm-0.1.2.apk. 2.59 MB)
    - A new module manager for Magisk Alpha/Canary
  • 21
    [Guide] Root Pixel 4a (5G) Android 12 Unlock/Lock Bootloader + Systemless ROOT
    Android Security Bulletin—December 2021
    Pixel Update Bulletin—December 2021

    Introduction
    This Guide is for Pixel 4a 5(G) owners that want to Root their phone, and enjoy the benefits of rooting it without installing a Custom ROM. However, for those that just can't live without a Custom ROM, take a look at 'Custom ROMs for Pixel 4a 5(G)'.

    NEW
    1. Magisk Modules for Magisk Alpha/Canary
    2. Magisk Alpha (vvb2060)


    Update(s)
    1. Factory/OTA Images - 06/12
    2. Magisk Stable - Magisk-23.0 05/12
    3. Magisk Beta - Magisk-23.0 05/12
    4. Magisk Canary - Magisk-2301x
    5. TWRP - Waiting for T.R.W.P. for Android 12
    6. SafetyNet - SafetyNetFix v2.2.0
    7. SDK Platform-tools - r31.0.3 08/18
    8. Custom Kernels
      • Waiting . . .
    9. Custom ROMs
      • ProtonAOSP[12] 11/01

    Disclaimer
    1. I assume no responsibility for the malfunctioning/bricking of your phone.
    2. The order of listed items i.e., Custom Kernels, Custom ROMS, etc. Does not indicate my preference for them. It is your responsibility to do the research before selecting an item.

    Prerequisites
    1. A Pixel 4a 5(G) phone with an unlocked bootloader.
    2. The latest Android Factory or OTA Image: "bramble" for Pixel 4a 5(G)

      Factory Image

      OTA Image
    3. A Computer with the latest SDK Platform-Tools: r31.0.3 installed.
      • Important: Update Platform Tools, regularly, for optimal performance.

    Other Guides

    Credits/Thanks/Recognitions
    1. @creezalird- Flash Android 12 factory image.
    2. Those I may have, inadvertently, forgotten.

    Index
    (NOTE: Numbers 1-11 are not steps, they are individual sets of instructions).
    1. Open a Command Prompt/Boot Fastboot Mode/Boot Recovery

      • Open a Command Prompt on Computer
        1. Open File Explorer, click the platform-tools folder ==> click the folder icon (left side of address bar) to highlight it type cmd and press enter.
        2. Open a Powershell Command Prompt on Computer: Open File Explorer, click the platform-tools folder ==> click the folder icon (left side of address bar) to highlight it type powershell and press enter.
        3. Notes:
          • Enable USB Debugging, on your phone: Settings ==> System ==> Advanced ==> Developer options ==> Scroll down to USB debugging and enable it.
          • When using the Powershell Command Prompt Commands must be preceeded with ./: i.e, ./fastboot devices
          • If you do not want to open a Command Prompt every time you want to use the fastboot command, add the path to the Platform-tools folder to Windows environment variables.
      • Boot fastboot mode (bootloader):
        • Power off phone, press and hold the power and volume down buttons until you see Start.
      • Boot Recovery
        • Power off phone, press and hold the power and volume down buttons until you see Start. Use volume up/down button until you see Recovery mode. Press power button.
    2. Test fastboot

      • Enable Developer Options - Tap Settings > About phone > Build number 7 times or until you should see 'you are a Developer'.
      • Enable USB Debugging - Tap Settings > System > Advanced > Developer options >
        Enable USB Debugging.
      • Open a Command Prompt on your computer in the Platform-tools folder.
      • Boot fastboot mode on your phone (#1)
      • Connect the phone to the Computer.
      • At the prompt type: fastboot devices to verify communication with phone. It should return your phone's serial number.
    3. Unlock Bootloader/Return Phone to Stock/Lock Bootloader

      • Unlock Bootloader

        1. This will erase all user data from the device!
        2. Backup your data
        3. Activate Developer Options: Tap Settings > About Phone > Tap Build Number 7 times or until you see you are a Developer. Tap back > System > Advanced > Developer Options. Enable OEM Unlock and, USB Debugging.
        4. Boot fastboot mode
        5. Connect the phone to the Computer with USB cord.
        6. Open a Command Prompt on your computer and type fastboot flashing unlock and press enter.
        7. You should see a request for confirmation on your phone, use the volume keys to scroll and the power key to select.
        8. Allow the process to complete and then type fastboot reboot at the Command Prompt and press enter.
        9. When your phone reboots disconnect your usb cable.
          Notes: After unlocking your bootloader, you'll see a warning: The bootloader is unlocked and... You will see this warning until, you relock the bootloader.
          Do not relock your bootloader until you have returned the device to Stock.
      • Return Phone to Stock

        1. Backup your data/Internal storage
        2. Settings > System > Advanced > Reset Options > Erase all data (factory reset)
        3. Log in
        4. Set up phone
      • Lock Bootloader

        1. Return the phone to Stock before locking the bootloader, failure to do so could brick your phone
        2. This will erase all user data from the device!
        3. Boot fastboot mode
        4. Open a Command Prompt and type this at the Prompt: fastboot flashing lock
        5. You should see a request for confirmation on your phone, use the volume keys to scroll and the power key to select.
        6. Allow the process to complete, then type this at the Command Prompt: fastboot reboot
        7. Enable Developer Options: Settings > About phone > Tap Build number 7 times or until you see 'you are a developer'.
        8. Tap Back > Developer options and toggle OEM Unlock off.
    4. Install/Update Factory Image keep data or wipe data

      • Important Note(s):
        1. If you are upgrading your phone to Android 12 a wipe is, absolutely necessary, if you want to root your phone after the upgrade. Subsequent factory image updates do not require a wipe.
        2. If you are updating your phones firmware (factory image) and your phone was rooted: Disable all magisk modules and restore back Magisk app name if you hid it and reboot. Why? The magisk modules you are using may need updating to work with the updated firmware. Incompatiable modules cause bootloops. :(
        3. Always verify you have the latest version of SDK Platform-Tools installed on your computer before installing the Factory Image: Pixel 4a 5(G) - bramble.
        4. If you get an error: while flashing, try one of these options:
          • Change the USB port to a non charging USB port.
          • Change the USB cord.
          • Change Computers.
        5. Backup your data
        6. Download the latest Factory Image: Pixel 4a 5(G) - bramble to your Computer.
        7. Extract the factory Image to a folder.
      • Flash Factory Image Keep Data

        • Open the folder you extracted the Factory Image to and Edit the flash-all.bat file with a file editor i.e., DroidEdit app.
          1. Change this line: fastboot -w update image-bramble-aa9a.999999.999.zip
          2. to this: fastboot --disable-verity --disable-verification update image-bramble-sp1a.999999.999.zip
          3. Note: If you do not remove the -w your internal storage will be wiped.
        • After, you have edited the flash-all.bat file. Copy/Move these files to the Platform-tools folder:
          1. bootloader-bramble-....img
          2. flash-all.bat
          3. image-bramble-....zip
          4. radio-bramble-....img
        • Open a Command Prompt on your computer in the Platform-tools folder and type: flash-all at the Command Prompt and press enter.
        • The phone will reboot when flashing is complete.
        • Go-to 7. Root/Reroot with Magisk and Pass SafetyNet, • Patching the boot.img - to root/reroot.
      • Flash Factory Image Wipe Data

        • Open the folder you extracted the Factory Image to and Edit the flash-all.bat file with a file editor i.e., DroidEdit app.
          1. Change this line: fastboot -w update image-bramble-aa9a.999999.999.zip
          2. to this: fastboot -w --disable-verity --disable-verification update image-bramble-sp1a.999999.999.zip
          3. This will wipe your phone's Internal Storage.
        • Open the folder you extracted the Factory Image to and Copy/Move these files to the Platform-tools folder:
          1. bootloader-bramble-....img
          2. flash-all.bat
          3. image-bramble-....zip
          4. radio-bramble-....img
        • Open a Command Prompt on your computer in the Platform-tools folder and type: flash-all at the Command Prompt and press enter.
        • The phone will reboot when flashing is complete.
        • Setup phone
        • Enable Developer Mode and USB Debugging
          1. Setup => About phone => Tap Build number 7 times or untill you see you are a 'Developer'.
          2. Setup => System => Developer options => Enable Developer options => enable USB Debugging
        • Go-to 7. Root/Reroot with Magisk and Pass SafetyNet, • Patching the boot.img - to root/reroot.
    5. ADB Sideload

    6. Extract/Flash boot.img

      • Extract boot.img

        1. Download the latest Factory image to your phone.
        2. Extract the Factory Image file (bramble-r2d1a.999999.999-factory-99a9a99a.zip) to a folder.
        3. Open the folder and, extract the Image file (image-bramble-aa9a.999999.999.zip) into the folder.
      • Flash boot.img

        1. Flashing the boot.img removes root.
        2. Open the folder you extracted the 'image...zip' file to and copy the boot.img file to your computer's platform-tools folder or to the folder that has fastboot.exe in it.
        3. Boot fastboot mode
        4. Connect the phone to the Computer
        5. Open a Command Prompt and type the following command at the prompt:
          fastboot flash boot --slot all boot.img
        6. Reboot
    7. Root/Reroot with Magisk and Pass SafetyNet.

      • Android 12

        1. Upgrading to Android 12 and rooting your phone
          • OP, Index, 4. Install/Update Factory Image keep data or wipe data
        2. You wiped your phone when upgraded to Android 12. You want to update the factory image and re-root it.
          • OP, Index, 4. Install/Update Factory Image keep data or wipe data
      • Patching the boot.img - to root/reroot.

        1. Do #6 - Extract boot.img
        2. Install Magisk Canary 23015
          Note: Tap 3 dot menu across from canary => Download, app-debug.apk
        3. Open Magisk Canary App
        4. Set the Update Channel Canary.
        5. Tap Install (next to Magisk)
        6. Tap, Select and Patch a File
        7. Select the boot.img file you extracted from the latest factory image.
        8. Tap the ✓ (Check Mark)
        9. Tap Let's Go
        10. When you see done, the boot.img has been patched (magisk_patched_xxxxxx.img), and stored in the download folder.
        11. Reboot
        12. Copy the patched boot.img file to your computer's Platform-tools folder or the folder that has fastboot.exe in it.
        13. Boot fastboot mode
        14. Connect the phone to the Computer with USB cord.
        15. Open a Command Prompt in the folder you copied the patched boot.img to.
        16. Type fastboot flash boot "name of patched boot".img without the quote marks at the Prompt and press enter.
        17. Type fastboot reboot at the Prompt and press enter.
        18. Important Notes: If your phone boot loops try one of the following options:
          • Flash the 'stock' boot.img to both slots: fastboot flash boot boot.img --slot all
          • Boot Safe Mode - Press Power Off button ==> Press Power Off until you see boot Safe Mode ==> Press Ok.
      • Pass Safety Net with SafetyNet Fix 2.2.0

        1. Download File(s)
        2. Install SafetyNet Fix 2.2.0
          • Open Magisk
          • Tap Modules icon
          • Tap Install from storage
          • Navigate to the SafetyNetFix file you downloaded
          • Tap the SafetyNetFix file
          • Tap the check mark (✓ at the bottom) to start the installation.
          • After it installs tap the Save icon to save the log
          • Tap Reboot.
        3. Settings for Magisk Canary 23015
          • Open Magisk App
          • Tap the Setup icon.
          • Scroll down to App and set the Update Channel to Canary.
          • Scroll down to Check Updates and enable it.
          • Scroll down to Magisk and enable Zygisk and Enforce DenyList.
          • Tap Configure DenyList => Tap 3 Dot Menu => Check ✓ Show system apps => Check ✓ Google Play Store, Google Pay, etc.
          • Scroll down to Superuser and enable Enable Biometric Authentication.
        4. Get Device Certified Clear Google Play Services, Google Play Store, Google Pay, etc. data
          • Turn Airplane mode on
          • Open Settings
          • Tap Apps & notifications
          • Tap see all...
          • Tap three dot menu
          • Tap Show system
          • Scroll down to Google Play Store
          • Tap Storage and Cache
          • Tap Clear storage
            Note: Repeat the 3 steps above for Google Play Services, Google Pay, etc.
          • reboot
          • Turn Airplane mode off
        5. Check Device Certification
          • Open Google Play Store app
          • Tap Menu - Circle top right
          • Tap Settings
          • Tap About
          • Check Play protect certification.
    8. Set Magisk App Update Channel/Update Magisk

      • Set Magisk App Update Channel

        • Open Magisk App > Tap Settings icon > Update Channel > Select Stable, Beta, Canary or Custom.
      • Update Magisk

        1. When Magisk App notifies you of an update:
        2. Tap install.
        3. Select, Direct Install (Recommended)
        4. When it finishes installing
        5. Tap, Save Log
        6. Log location: /storage/emulated/0/Download
        7. Tap, Reboot
        8. Done!
    9. Custom ROMs

      • Need help with a Custom ROM?
        • First, read and follow the Installation Instructions. The installation instructions are in the OP.
        • Second, if you have a problem Installing it, Search the thread of the Custom ROM you are trying to install for a solution to problem: If you don't find a solution post your request for help on the thread.
      • ROMs
        • Alpha/Beta

          • None
        • Official
        • Unofficial

          • None
    10. Apps/Mods/Scripts/Tethering/Themes
    11. T.W.R.P. Backup/Restore

      • Waiting for Android 12 T.W.R.P.
    3
    hi @Homeboy76 ,
    maybe i'm wrong, but in your
    Prerequisites

    1. A Pixel 4a 5(G) phone with an unlocked bootloader.
    2. The latest Android 11 (R) Factory or OTA Image: "bramble" for Pixel 4a 5(G)
    3. Factory Image
    also at:
    4. Install/Update Factory Image keep or wipe data
    Just checked
    It is pointing to the Pixel 4a 5(G) bramble factory image.

    Download the latest Factory Image: Pixel 5 - bramble to your Computer. --> pixel 5 (only text)? Fixed!
    3
    Provided you are not on Verizon:
    Try reinstalling the stock boot.img from the update, flash the OTA, or perform another clean install. After first boot and performing any necessary setup (if clean install), power off phone, remove sim card, reboot. Creat a new patched boot.img, install it and reboot. Turn phone off, reinstall sim card, reboot as normal. Should fix the issue. Make sure you are using the latest magisk (I prefer stable of canary personally but it's your call).
    If you are on verizon, do not install the April update in this thread, as it is stated "All carriers EXCEPT Verizon."

    However, there is an OTA update on the official frimware website that does work on Verizon. I just flashed it myself. Maybe Homeboy76 could update thread?
    :( Do not repeat do not follow these instructions. The information is only partially correct. :(

    I just checked the Factory image and the OTA image pages the only change was the All carriers EXCEPT Verizon has been removed from the images description.

    The OP has been updated to reflect the change.

    These images work on Verizon Pixel 4a 5g phones.
    3
    Thanks for the write-up. Just got one of these as I dropped my old phone, and I was due anyways. So question regarding Safetynet. I went ahead and went with the latest Feb factory image, patched the boot and rooted with Magisk, then tried the safety net and attestation fails. Anybody have the feb patch and passing safetynet? if so what was the sequence you used? thanks
    - Root with Magisk patched img
    - Open Magisk Manager install SafetyNet module
    - Reboot
    - Open Magisk Manager Enable Magisk hide
    - Hide Google Play store, Google pay, etc
    - Clear cache and storage for the above apps
    - Reboot
    2
    Thanks for the write-up. Just got one of these as I dropped my old phone, and I was due anyways. So question regarding Safetynet. I went ahead and went with the latest Feb factory image, patched the boot and rooted with Magisk, then tried the safety net and attestation fails. Anybody have the feb patch and passing safetynet? if so what was the sequence you used? thanks

    You need Universal Safetynet fix v 1.1.1 Magisk module.