How To Guide [Magisk][US/CAN BL Unlock] Root for Galaxy S21 Series (B/N/0/U/U1/W)

[passionicon]

Hi all, just want to ask a few questions and will appreciate all the responses i can get. I'm on G998u1.
I read that rooting trips knox, don't reallycare ,but does Samsung pay still work after rooting?

Also, will i be able to successfully install xposed framework after magisk root. It's literally the only reason i want to root because i use some xposed modules at work.

Finally, does this method still work? I'm on latest march 1 security patch +oneui 4.1


Thanks in anticipation

 

[basem55]

Hi,
Is it normal that the Magisk Modules Not Showing Up ?
See attached images kindly,


I have Rooted by Recovery method ,
And I'm coming from old Samsung S7,
and the Magisk Modules were Showing Up.

My current system:
Samsung S21 SM-G998B/DS
Android 11
PDA : G998BXXU3AUHB
One Ui 3.1
Magisk v24.0
LSPosed 1.83
____________

Sorry for my bad English, and thanks in advance.

 

[ebowen 747]

I have S21U g9980, unlocked bootloader. If I update firmware will I need to unlock again. On one UI 3.1 Android 11. Want to upgrade to 4.1 Android 12. Can I upgrade and retain bootloader unlock and root?

 

[Mon732003]

Good pro

 

[Valiante]

I'm not sure if search on XDA is messed up or what. No mention of the S22 in the thread.

Can anyone verify if this works for the S22 as well?

 

[afaneh92]

I'm not sure if search on XDA is messed up or what. No mention of the S22 in the thread.

Can anyone verify if this works for the S22 as well?

Yes same can apply to S22

 

[JD_888]

I'm on Boost mobile network Galaxy S21 5g SM-G991U software ver. G991USQS5CVHC
running all the latest security patches & such

Is this method still valid & if so will it work for my model? I only want to root to be able to install/run apps that won't work properly without root access, & don't plan on making any extreme modifications beyond the initial root.
(P.s. Any links to threads or ways to find threads & people that I can talk to personally one on one with or anything like that would be greatly appreciated!)

 

[afaneh92]

I'm on Boost mobile network Galaxy S21 5g SM-G991U software ver. G991USQS5CVHC
running all the latest security patches & such

Is this method still valid & if so will it work for my model? I only want to root to be able to install/run apps that won't work properly without root access, & don't plan on making any extreme modifications beyond the initial root.
(P.s. Any links to threads or ways to find threads & people that I can talk to personally one on one with or anything like that would be greatly appreciated!)

You are on v5 bootloader, only v1 can be unlocked

 

[WALEEDALMOALLEM]

Note: this guide copied from topjohnwu's. Original guide here

US/Canada bootloader unlock thread:
here

Before Installing Magisk

• Installing Magisk WILL trip KNOX
• Unlocking bootloader for the first time will do a data wipe.

Installation

If you already have Magisk installed, it is strongly recommended to upgrade directly via Magisk Manager using the “Direct Install” method. The following tutorial is only for initial installation.

Getting Started

Before you start:

• This tutorial assumes you understand how to use adb and fastboot
• If you plan to also install custom kernels, install it after Magisk
• Your device’s bootloader has to be unlocked

Download and install the latest Magisk app. In the home screen, you should see:

The result of Ramdisk determines whether your device has ramdisk in the boot partition.

Unlocking Bootloader

Unlocking BL on modern Samsung devices have some caveats, so I figure this would be helpful.

• Allow bootloader unlocking in Developer options → OEM unlocking
• Reboot to download mode: power off your device and press the download mode key combo for your device (Vol Down + Vol Up) while connected to usb.
• Long press volume up to unlock the bootloader. This will wipe your data and automatically reboot.

If you think the bootloader is fully unlocked, it is actually not! Samsung introduced VaultKeeper, meaning the bootloader will still reject any unofficial partitions before VaultKeeper explicitly allows it.

• Go through the initial setup. Skip through all the steps since data will be wiped again later when we are installing Magisk. Connect the device to Internet during the setup.
• Enable developer options, and confirm that the OEM unlocking option exists and is grayed out. This means the VaultKeeper service has unleashed the bootloader.
• Your bootloader now accepts unofficial images in download mode.

Patching Boot Image

If your device has boot ramdisk, you need a copy of the boot.img

Instructions

• Use either Frija or Samloader to download the latest firmware zip of your device directly from Samsung servers.
• Unzip the boot.img from AP and copy the file to your device.
• Press the Install button in the Magisk card
• Choose “Select and Patch a File” in method, and select the stock boot image
• Magisk Manager will patch the image to [Internal Storage]/Download/magisk_patched.img.
• Copy the patched image to your PC
• Flash the patched boot image to your device.
  For most devices, reboot into fastboot mode and flash with command:
  fastboot flash boot /path/to/magisk_patched.img or
  Rename magisk_patched.img to boot.img and use 7zip to make flashable tar of your boot.img
  Reboot to download mode. Open Odin on your PC, and flash boot_patched.tar as AP.
• Reboot and voila!

Patching AP

Instructions

• Use either Frija or Samloader to download the latest firmware zip of your device directly from Samsung servers.
• Unzip the firmware and copy the AP tar file to your device. It is normally named as AP_[device_model_sw_ver].tar.md5
• Press the Install button in the Magisk card
• Choose “Select and Patch a File” in method, and select the AP tar file
• Magisk Manager will patch the whole firmware file to [Internal Storage]/Download/magisk_patched.tar
• Start the installation, and copy the patched tar file to your PC using ADB:
  adb pull /sdcard/Download/magisk_patched_[random_strings].tar
  DO NOT USE MTP as it is known to corrupt large files.
• Reboot to download mode. Open Odin on your PC, and flash magisk_patched.tar as AP, together with BL, CP, and CSC (NOT HOME_CSC because we want to wipe data) from the original firmware.
• Your device should reboot automatically once Odin finished flashing. Agree to do a factory reset if asked.
• Install the Magisk app you’ve already downloaded and launch the app. It should show a dialog asking for additional setup.
• Let the app do its job and automatically reboot the device. Voila!

Custom Recovery​

Installing using custom recoveries such as TWRP is only possible if your device has boot ramdisk.

Instructions

• Download the Magisk APK
• Rename the .apk file extension to .zip, for example: Magisk-v2*.*.apk → Magisk-v2*.*.zip. If you have trouble renaming the file extension (like on Windows), use a file manager on Android or the one included in TWRP to rename the file.
• Flash the zip just like any other ordinary flashable zip.
• Reboot and check whether the Magisk app is installed. If it isn’t installed automatically, manually install the APK.

Thanks
@topjohnwu for magisk and guide, If you appreciate his effort, show some love and support

Donations
https://www.patreon.com/topjohnwu
https://www.paypal.me/topjohnwu

Its work with my sm-G998B android 13 beta 3 OneUI 5

THanks pro

 

[afaneh92]

Its work with my sm-G998B android 13 beta 3 OneUI 5

THanks pro

Yes

 

[korsnick]

I have a Hong Kong SM-G9980 and by following the steps in post #85 of this thread, I was able to get the OEM Unlock option to show up in the menu. When I then tried to go into the bootloader screen:

instead of he long press to unlock it, i did a short press and then had to reboot to try again. However the OEM unlock was no longer in the Developer Options menu. I tried a Factory Reset and then went through the steps in post #85 but cannot get the OEM Unlock option to appear again. Any thoughts on what I can do at this point?

UPDATE:
I did another factory reset, went through the steps in post #85 again and this time was able to get the OEM Unlock toggle to show up- and it was already turned on. When I powered off the phone, connected the USB cable and held down the vol up and down buttons, I got a blue screen like the picture above, but there was no 'Device unlock mode' option. So still no joy...

 

[afaneh92]

I have a Hong Kong SM-G9980 and by following the steps in post #85 of this thread, I was able to get the OEM Unlock option to show up in the menu. When I then tried to go into the bootloader screen: View attachment 5759589

instead of he long press to unlock it, i did a short press and then had to reboot to try again. However the OEM unlock was no longer in the Developer Options menu. I tried a Factory Reset and then went through the steps in post #85 but cannot get the OEM Unlock option to appear again. Any thoughts on what I can do at this point?

UPDATE:
I did another factory reset, went through the steps in post #85 again and this time was able to get the OEM Unlock toggle to show up- and it was already turned on. When I powered off the phone, connected the USB cable and held down the vol up and down buttons, I got a blue screen like the picture above, but there was no 'Device unlock mode' option. So still no joy...

post download mode picture or at least kg status

 

[korsnick]

post download mode picture or at least kg status

 

[korsnick]

Sounds like nobody has seen this before. Really sucks because I ordered this phone specifically so I could get root on it- something I couldn't do with my TMO model. Guess I'm just gonna have to put it up for sale then.

 

[korsnick]

Well I was actually able to get the unlock option to show up by putting a SIM in the phone and going through all the steps once more. So yay!

 

[Quayron]

so last year there was certain versions wasnt able to unlock due to uiversion,, did we fix that is all s21u versions unlockable now or is there any list of available versions , can somrone give me hand very quick please

 

[mon0theist]

Which is the best variant to buy for the easiest way to root? Would SM-G998U1 be good?

 

[afaneh92]

Which is the best variant to buy for the easiest way to root? Would SM-G998U1 be good?

No, US device can be unlocked on v1 bootloader only and cost you money

 

[thechaoz]

I have Android 13

I don't see oem unlocking in dev options nor is it available in search

 

[DaeDae<3]

Is it possible to root Samsung S21 5G SM-G991U Snapdragon 888??