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[HOW TO - YOUTUBE VIDEO] Root (Magisk) - Galaxy S21 & S21+ & S21 Ultra - Exynos-only

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MikeTheTechSavvy

Senior Member
Sep 24, 2017
63
122
bit.ly
Hello everyone,

Here is a complete step-by-step video guide of a very straightforward method that works flawlessly for rooting the Galaxy S21 (or any other Exynos-based S21 such as the S21+ & S21 Ultra) and installing Magisk onto it.

It only works on Exynos-powered S21 devices (S21 - S21+ - S21 Ultra including all 5G versions), please do not try it on Snapdragon versions.


Enjoy!
 

Stig2267

Member
Jun 4, 2018
11
10
What is the disadvantage of rooting this phone, i just got my S21 on sunday and this is my first samsung phone
 

doggydog2

Senior Member
I would say that the biggest disadvantage is that it voids your warranty. Other than that, it's only +++
Agree except in Europe, it cannot void the warranty. Tripping Knoxx is my first proud duty on each Samsung device :)
Re HOME_CSC I might quote topnjohnwu classic guide:
"Use HOME_CSC to preserve your data when doing a firmware upgrade in the future. Using CSC is only necessary for the initial Magisk installation."
 

fasho

Member
Jul 2, 2007
45
8
Hello everyone,

Here is a complete step-by-step video guide of a very straightforward method that works flawlessly for rooting the Galaxy S21 (or any other Exynos-based S21 such as the S21+ & S21 Ultra) and installing Magisk onto it.

It only works on Exynos-powered S21 devices (S21 - S21+ - S21 Ultra including all 5G versions), please do not try it on Snapdragon versions.


Enjoy!
HOW TO ADD TWRP AFTER MAGISK ROOT
 

fasho

Member
Jul 2, 2007
45
8
Hello everyone,

Here is a complete step-by-step video guide of a very straightforward method that works flawlessly for rooting the Galaxy S21 (or any other Exynos-based S21 such as the S21+ & S21 Ultra) and installing Magisk onto it.

It only works on Exynos-powered S21 devices (S21 - S21+ - S21 Ultra including all 5G versions), please do not try it on Snapdragon versions.


Enjoy!
For some reason, the bootloader cannot be unlocked in download mode
I think Samsung is the reason
I am on the release BXXU2AUC8
Note, it was booted in reCrecovery mode and then restarted in download mode, but unfortunately, the option to open the bootloader does not appear

update
sorry the right way is vol button up and down same time then connect usb Not vol down and power

thank you
 
Last edited:

immelmann

Member
Jan 7, 2014
24
1
Hi guys,

can u help me with some details. I read few treads about rooting S21 but they all seems to copy from each other and I still couldn’t find reliable answers. I hope to hear from someone who actualy using rooted galaxy phone (and not someone who know someone who heard something)

  • Is the rooting (with Magisk) completely reversable. Will it “retrigger”Knox to the original state?
  • Did you actually tried to use apps like online banking/NFC pay or Paypal and it worked (or dont)?
 

doggydog2

Senior Member
Hi guys,

can u help me with some details. I read few treads about rooting S21 but they all seems to copy from each other and I still couldn’t find reliable answers. I hope to hear from someone who actualy using rooted galaxy phone (and not someone who know someone who heard something)

  • Is the rooting (with Magisk) completely reversable. Will it “retrigger”Knox to the original state?
  • Did you actually tried to use apps like online banking/NFC pay or Paypal and it worked (or dont)?
i've heard from someone yes, no, yes, yes ;) rooted every samsung since the first Galaxy model, year by year, ain't a damn thang changed re usability. bankin', paypalin' all day and night. knoxx scaremongering bs and warranty FUD came in 2015, was hacked in first cycle, and then not.. but noone gives a **** about some invisible fuse anymore, certainly not your next buyer:) after you have enough of the phone, you relock bootloader, flash original firmware, the error screen will disappear and the next user will happily use a completely reversed phone in default state:p
If I root my S21, will I be able to record calls? How?
install xposed plugin Firefds and turn on. Turn on the recording in the official app.
 

immelmann

Member
Jan 7, 2014
24
1
i've heard from someone yes, no, yes, yes ;) rooted every samsung since the first Galaxy model, year by year, ain't a damn thang changed re usability. bankin', paypalin' all day and night. knoxx scaremongering bs and warranty FUD came in 2015, was hacked in first cycle, and then not.. but noone gives a **** about some invisible fuse anymore, certainly not your next buyer:) after you have enough of the phone, you relock bootloader, flash original firmware, the error screen will disappear and the next user will happily use a completely reversed phone in default state

Are you actually using the UpToDate S21 and app like PayPal at this moment?


Your post is exactly what confuses me. If you google for “magisk & paypal” there are loot of posts where people are unable to use banking apps and are looking for help (and that John Wu is working for google for some time now). On the other hand, there are people who say that everything works and “knoxx is scaremongering”, even if the author of this guide has said here "it will permanently trigger Knox”. And I can say as someone who unlocked a few bootloader in the past: there was always something that didn’t work after root.
 

doggydog2

Senior Member
Are you actually using the UpToDate S21 and app like PayPal at this moment?


Your post is exactly what confuses me. If you google for “magisk & paypal” there are loot of posts where people are unable to use banking apps and are looking for help (and that John Wu is working for google for some time now). On the other hand, there are people who say that everything works and “knoxx is scaremongering”, even if the author of this guide has said here "it will permanently trigger Knox”. And I can say as someone who unlocked a few bootloader in the past: there was always something that didn’t work after root.
Gun to my head: i guess so;) Why would Paypal not work? You must be digging some old information from archives. It's so 2018. PayPal works nonstop, on tons of rooted models, without interruption, for years. Knoxx is so 2015, let's make a funeral for it already. I flashed 5 unique samsungs models last month, i dont share any of your concerns, because all i see is rooted devices work perfectly fine.

You shouldn't be looking for reasons not to root. People recycle the texts as this information didn't change for years. In general: you lose OTA on all brands except OnePlus/Google, and on Samsung you lose "cry me a river" SPay, Secure Folder, S Flow (until you tell Magisk to hide). Some 3rd party stupid (banking?) apps will try to detect root, and you the user will prevent that or troubleshoot individually, by searching on xda. Or stop using it. Sure i don't know have the full list of such ****ty banks, as my bank officially supports root (we the users pointed guns to their heads), but some weird bank can't stop me from rooting. But it's off topic anyways as this is problem (i'd say bug) in specific apps, not in "rooting" or "samsung" or "google" or "johnwu". Don't overthink. Just root:)
 

immelmann

Member
Jan 7, 2014
24
1

So instead on answering my questions with “No” or “I don’t know” you have decided to describe your feelings. Sourceless posts like yours are one of the reasons why it is so difficult to become a power user.

Very classy of you to call banking apps (which are per default 3rd party) stupid because they trying to avoid fraud. By the way magisk doesn’t have hiding root capability per default anymore.
 

doggydog2

Senior Member
So instead on answering my questions with “No” or “I don’t know” you have decided to describe your feelings. Sourceless posts like yours are one of the reasons why it is so difficult to become a power user.

Very classy of you to call banking apps (which are per default 3rd party) stupid because they trying to avoid fraud. By the way magisk doesn’t have hiding root capability per default anymore.
i knew it could trigger your feelings, but like i say, it works. Power user means you root and than fix situations. That's what i favor over moaning about 2015 knoxx, 2018 paypal, 2020 magiskhide, 2021 topjohnwu in google. At this moment, once again, samsung after samsung, everything works with no divergence. In my case without any effort, so i try to simulate it as im writing this post, grabbed some antiroot ****ty 3rd party app called HDFC Bank -> fixed by hiding it, and hiding Magisk. 3 minutes. This old method still works. If Hide won't work, Xposed will help. If Magisk won't work (lol), we still figure out. I'm far from negative.

if it's the 3rd party apps who don't want people to become power users in the name of false security, let them know. It was indeed very classy of me to call out my ****ty bank when they tried to disallow VPN and then root. Now they have confirmation box to confirm root thanks to us power users. That's cool. 3 minutes saved per user!:) #GunToAntirootHeads
 

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    Hello everyone,

    Here is a complete step-by-step video guide of a very straightforward method that works flawlessly for rooting the Galaxy S21 (or any other Exynos-based S21 such as the S21+ & S21 Ultra) and installing Magisk onto it.

    It only works on Exynos-powered S21 devices (S21 - S21+ - S21 Ultra including all 5G versions), please do not try it on Snapdragon versions.


    Enjoy!