[GUIDE] How To Create Rooted Stock [Firmware / ROM] With Magisk & Flash It - Samsung Galaxy A21s Guides, News, & Discussion

Disclaimer :
Any Damage Done To Your Device Will Be Under Your Responsibility.
The Author Nor Me Will Not Take Any Responsibility.
Please Do Think Before You Take Action Toward Your Device.
Warning :
Any Action Taken Will Void The Warranty On Your Device.
It Might Also Cause Bootloop, Softbricked Device, Device Instability & More
Tutorial :
1.) Make Sure Stock Rom (Without Any [Modification / Tweak / Customization]) Are [Flashed / Installed] On Your Device
2.) Download & Install [Modded / Patched] Magisk Provided By grccorps Using [Package Installer / Android Debug Bridge (ADB)]
{[Modded / Patched] Magisk : Download}
3.) Download Stock [Firmware / ROM] For Your Device Using Computer
{Samsung [Firmware / ROM] Download Site :
- SamMobile
- Samfw
}
4.) Extract The Downloaded [Firmware / ROM] Using [WinRAR / WinZIP / 7ZIP [ZS]]
5.) Open The Extracted Folder
6.) Move The File Starting With "AP" To Your Device Using [Android Debug Bridge (ADB) / Windows Explorer]
7.) Run Installed [Modded / Patched] Magisk
8.) Tap On The Install In The Box With The Title "Magisk"
9.) Tap On "Select & Patch A File"
10.) Locate The File Starting With "AP"
11.) Tap On The File Starting With "AP"
12.) Keep The Screen Awake & Wait For The Process To Complete
13.) Move The File With "magisk_patched_[Random Number].tar" To Computer
14.) Download Any Version Of Odin
{Original :
- 3.13.1
- 3.13.3
- 3.14.1
}
{Patched :
- 3.13.1
- 3.13.3
- 3.14.1
}
15.) Extract The Downloaded ZIP File Using [WinRAR / WinZIP / 7ZIP [ZS]]
16.) Open The Extracted Folder
17.) Double Click On The Executable Starting With "Odin"
18.) Click On "BL" & Select The File That Start With "BL" In Extracted Stock [Firmware / ROM] Folder
19.) Click On "CP" & Select The File That Start With "CP" In Extracted Stock [Firmware / ROM] Folder
20.) Click On "CSC" & Select The File That Start With "CSC" In Extracted Stock [Firmware / ROM] Folder
21.) Click On "AP" & Select The File With "magisk_patched_[Random Number].tar"
22.) Click On Start
23.) Wait For The Process To Complete
Feel Free To Ask Any Question As I Will Try To Answer Them As Fast As Possible

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Thanks a lot for this step by step. One question though: is it possible to achieve the same results by using Heimdall? I don't count with a windows computer at the moment and I'm not sure if these 2 softwares follow the same interface structure.
Thank you in advance

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Hi, I want to ask if there will ever be a recovery for this TWRP model?

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To Wowoslaw :
In My Opinion,
[Official Version] :
No, Team Win Doesn,'t Seem To Have Interest To Make A Recovery For This Device.
[Unofficial Version] :
Yes, As A Recovery For This Device Has Came Out, But Is Unusable Due To The Bug Know As Decryption Failure.

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LonelyCracker said:
Disclaimer :
Any Damage Done To Your Device Will Be Under Your Responsibility.
The Author Nor Me Will Not Take Any Responsibility.
Please Do Think Before You Take Action Toward Your Device.
Warning :
Any Action Taken Will Void The Warranty On Your Device.
It Might Also Cause Bootloop, Softbricked Device, Device Instability & More
Tutorial :
1.) Make Sure Stock Rom (Without Any [Modification / Tweak / Customization]) Are [Flashed / Installed] On Your Device
2.) Download & Install [Modded / Patched] Magisk Provided By grccorps Using [Package Installer / Android Debug Bridge (ADB)]
{[Modded / Patched] Magisk : Download}
3.) Download Stock [Firmware / ROM] For Your Device Using Computer
{Samsung [Firmware / ROM] Download Site :
- SamMobile
- Samfw
}
4.) Extract The Downloaded [Firmware / ROM] Using [WinRAR / WinZIP / 7ZIP [ZS]]
5.) Open The Extracted Folder
6.) Move The File Starting With "AP" To Your Device Using [Android Debug Bridge (ADB) / Windows Explorer]
7.) Run Installed [Modded / Patched] Magisk
8.) Tap On The Install In The Box With The Title "Magisk"
9.) Tap On "Select & Patch A File"
10.) Locate The File Starting With "AP"
11.) Tap On The File Starting With "AP"
12.) Keep The Screen Awake & Wait For The Process To Complete
13.) Move The File With "magisk_patched_[Random Number].tar" To Computer
14.) Download Any Version Of Odin
{Original :
- 3.13.1
- 3.13.3
- 3.14.1
}
{Patched :
- 3.13.1
- 3.13.3
- 3.14.1
}
15.) Extract The Downloaded ZIP File Using [WinRAR / WinZIP / 7ZIP [ZS]]
16.) Open The Extracted Folder
17.) Double Click On The Executable Starting With "Odin"
18.) Click On "BL" & Select The File That Start With "BL" In Extracted Stock [Firmware / ROM] Folder
19.) Click On "CP" & Select The File That Start With "CP" In Extracted Stock [Firmware / ROM] Folder
20.) Click On "CSC" & Select The File That Start With "CSC" In Extracted Stock [Firmware / ROM] Folder
21.) Click On "AP" & Select The File With "magisk_patched_[Random Number].tar"
22.) Click On Start
23.) Wait For The Process To Complete
Feel Free To Ask Any Question As I Will Try To Answer Them As Fast As Possible
Click to expand...
Click to collapse
Hi i tried this method and everything was successful it flashed then the warning that it's an unofficial software came up but then when i installed the patched magisk and the root checker it said that my device wasn't rooted successfully

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i rooted my device with this method once and it worked and then i tried some custom rom and came to stock firmware but now when i try this method it just dosent work it flashes, then i fill details then it is the same as before and in about phone shows phone status(tried multiple methods for 2 days now)