Hi, thanks for post but I have a question.
If I dont like an upgrade (oneui 5 etc.) can I downgrade my phone without unlock bootloader?
If I dont like an upgrade (oneui 5 etc.) can I downgrade my phone without unlock bootloader?
How To Guide Guide to root Galaxy S21 FE (B/N/0), unlock bootloader and flash official firmware (noob friendly)
- Thread starter Williamtung
- Start date
my last Samsung was a S4 without knox... sooooo lemme be the dumbass here:
got a G990B/DS (Germany) should be unlocked since i just bought it in a store not from a carrier.
will this howto still work on my SW Version?
SP1A.210812.016.G990BXXU2CVD9
btw samloader/bifrost errors out: (windows & mobile)
io.ktor.client.features.ClientRequestException: Client request(https://fota-cloud-dn.ospserver.net:443/firmware/EUX/G990B/version.xml) invalid: 403 Forbidden. Text: "<?xml version="1.0" encoding="UTF-8"?>
<Error><Code>AccessDenied</Code><Message>Access Denied.</Message><Resource></Resource><RequestId>171ED55753E9324E</RequestId><HostId>44</HostId></Error>"
just to make it clear:
my bootloader is unlocked and magisk patching is no news to me
but: i can't get the fw to download anywhere (tried differnet mirrors)
got a G990B/DS (Germany) should be unlocked since i just bought it in a store not from a carrier.
will this howto still work on my SW Version?
SP1A.210812.016.G990BXXU2CVD9
btw samloader/bifrost errors out: (windows & mobile)
io.ktor.client.features.ClientRequestException: Client request(https://fota-cloud-dn.ospserver.net:443/firmware/EUX/G990B/version.xml) invalid: 403 Forbidden. Text: "<?xml version="1.0" encoding="UTF-8"?>
<Error><Code>AccessDenied</Code><Message>Access Denied.</Message><Resource></Resource><RequestId>171ED55753E9324E</RequestId><HostId>44</HostId></Error>"
just to make it clear:
my bootloader is unlocked and magisk patching is no news to me
but: i can't get the fw to download anywhere (tried differnet mirrors)
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good morning,
i want modding my phone just for recording all call by bluetooth samsung buds.
I have some questions:
1) before modding i have to reset phone and make a backup of all data and app?
2) I have installed also samsung pay, about security will remain same or is better to not use phone as credit card anymore?
3) I have Kaspersky antivirus, will protect phone as before and will work well also after modding?
4) I write from italy, the language after modding will remain italian?
5) My phone is still in warranty, after modding it is possible to go back on original software?
Many thanks in advance.
Kind regards
i want modding my phone just for recording all call by bluetooth samsung buds.
I have some questions:
1) before modding i have to reset phone and make a backup of all data and app?
2) I have installed also samsung pay, about security will remain same or is better to not use phone as credit card anymore?
3) I have Kaspersky antivirus, will protect phone as before and will work well also after modding?
4) I write from italy, the language after modding will remain italian?
5) My phone is still in warranty, after modding it is possible to go back on original software?
Many thanks in advance.
Kind regards
Last edited:
Hello everyone, I have s21 fe G990BXXU1CVC3 (SD 888) blocked by the operator. Can I somehow reflash it to unlock it? The phone cannot be used due to the lock. I also wanted to clarify, as I understand it, the bootloader on 888 cannot be unlocked and set the root accordingly, right?
Personally I do not think that you'd obtain any support there. Phone locked by operator (apart from the SIM lock preventing the phone from using other network providers, what can be easily bypassed by obtaining the code) is set on the device (e.g. IMEI lock) as result of not fully paid back phone credit or reported phone being stolen.
In both cases unlocking it would be illegal.
У меня есть s21 fe (g990u1), он live demo unit, но я его прошил на обычную прошивку, и там нету пункта OEM unlock, помогите пж
У меня s21 fe (g990u1), это живой демо-аппарат, но я прошил его обычной прошивкой, и там нет пункта разблокировки OEM, помогите пожалуйста
У меня s21 fe (g990u1), это живой демо-аппарат, но я прошил его обычной прошивкой, и там нет пункта разблокировки OEM, помогите пожалуйста
OK so after unlocking bootloader and getting root - you lost connection to Cameras on Samsung firmware!
Plus some of samsung apps using knox security don't work like Samsung Health which is using for Galaxy Wear smartwtches. (is bypass i know)
I don't recommend to doing for now this because i don't get to working camera app on rooted with magisk phone on samsung firmware, and any other GSI roms have more likely support for one main camera (on OpenCamera in GSI ultrawide works but like 1 time on 4 atteps )
Plus some of samsung apps using knox security don't work like Samsung Health which is using for Galaxy Wear smartwtches. (is bypass i know)
I don't recommend to doing for now this because i don't get to working camera app on rooted with magisk phone on samsung firmware, and any other GSI roms have more likely support for one main camera (on OpenCamera in GSI ultrawide works but like 1 time on 4 atteps )
Hello everyone, I have an S21 FE G-990B with EUX firmware and when I try to flash the EUY firmware Odin says it was successful, but when the phone restarts it continues with the EUX version. I follow the tutorial that is on the first page of this topic, but always with the same result.
Sir please help me I have a Samsung S21 FE. I tried many solutions to unlock bootloader but didn't unlock the bootloader. Now what I do?
Hi guys, I would like to know how you proceed ususally with OTA's. Is it possible to re-root without losing any data?
As far as I am aware, only starting on One UI 6.0 Samsung will have A/B partitions which will make keeping root after OTA's easier.
Many thanks in advance!
As far as I am aware, only starting on One UI 6.0 Samsung will have A/B partitions which will make keeping root after OTA's easier.
Many thanks in advance!
You have this version Galaxy S21 FE G990B?My S21 FE is rooted and camera still awesome. Don't know what you mean by broken but all I need is working like it should (pictures, vidéo, zoom, effects, pro...). To me, you can root without fear
Hello everyone!
I have this issue with S21 FE. I bought this for my wife with the idea that I could flash via ODIN, but now I understand that the problem is much more serious
Maybe you know how it is possible to install firmware or maybe i have to install a custom one for use it?
I have this issue with S21 FE. I bought this for my wife with the idea that I could flash via ODIN, but now I understand that the problem is much more serious
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Your warranty is now void. If you root your device, Your KNOX status will be tripped. You can still pass the safety net after you root if you follow the instructions. I am not responsible for bricked devices, dead SD cards although it is not really possible Please do some research if you have any concerns about doing this to your device
How to flash official firmware? (not the root and unlock bootloader part!)
You will need:
A Galaxy S21 FE and common sense
Samsung Odin (the flashing tool of the official firmware)
https://dl2018.sammobile.com/Odin3-v3.14.1.zip
You need to extract the zip file and you are going to use the file Odin3_v3.14.1.exe inside the folder.
Samsung Android USB Driver for Windows
Samsung Android USB Driver | Samsung Developers
You need the driver only if you are developing...developer.samsung.com
Double-click and install the exe file.
Samsung Official Firmware
Download the platform you want to download to. (Windows)
You need to extract the zip and double click open the file Bifrost.exe inside the folder.
You need to fill in the Model, Region, press the Check for Updates button and the Download button.
How to find the Model: on your phone → Settings → About Phone → The third row says the Model number and you need to remove the part with the part of /xx, for example, SM-G990B/DS and you only need to type SM-G990B
How to find the Region: You can check the Region at this link https://samfrew.com/model/SM-G990B/
You need to find find a three-letter word depending on your carrier and country and type it in Bifrost, for example, EVR
Press the Check for Update button and download it with the Download button.
Put it to a place you can easily find, ie. Desktop.
After downloading it, find the file SM-xxxxx_x_xxxxxxxx_xxx.zip.enc4 on the place you put it and change the document format from .enc4 to .zip. Then, double click and extract the file.
Open Odin3_v3.14.1.exe and turn off your phone. Connect a side of your USB to your PC/Laptop, keep pressing volume up and down together until you go to Download Mode. Put another side of the USB into your phone. When you arrived at Download Mode press volume up. Go back to Odin3_v3.14.1.exe:
-Click on BL and select BL_xxxxxxxxxx.tar.md5
-Click on AP and select AP_xxxxxxxxxxx.tar.md5
-Click on CP and select CP_xxxxxxxxxx.tar.md5
(If you want to keep your data don't flash CSC).
-Click on CSC and select CSC_OMC_xxxxxxxxxx.tar.md5
-Click on USERDATA and select HOME_CSC_OMC_xxxxxxxxxx.tar.md5
Press Start to flash the firmware, after done, your device will automatically reboot to the system.
How to unlock the bootloader?
Go to your phone → Settings → About Phone → Software information → Press Build number 6 times until you see the notice “You’re now a developer”
Go in Settings → Developer options → enable OEM unlocking
Power off your phone first. Then, connect a side of your USB to your PC/Laptop, keep pressing volume up and down together until you go to Download Mode. Put another side of the USB into your phone.
When you arrived at Download Mode, long press volume up until you see the black screen. Confirm to unlock the bootloader and you will erase your device.
How to root your phone?
After you unlock your bootloader, you set up your phone and make sure you do not sign in google account first. Install Magisk https://github.com/topjohnwu/Magisk/releases/download/v24.1/Magisk-v24.1.apk on your phone. Oh yes, in case you do not know, you need to allow the app to install apps so that you can install the apk.
Transfer AP_xxxxxxxxxx.tar.md5 in the firmware you download from your PC/Laptop to your phone.
Open Magisk on your phone and press the install button in the Magisk column. Select 'Select and Patch a File', 'Let's Go' and find the AP_xxxxxxxxxx.tar.md5 and select it. You can have a cup of coffee if you like when you waiting for the patching of the file.
After finishing the patching, you need to transfer the file magisk_patched-24xxx_xxxxx.tar in the Downloads folder back to your PC/Laptop.
Turn off your phone. Connect a side of your USB to your PC/Laptop, keep pressing volume up and down together until you go to Download Mode. Put another side of the USB into your phone. When you arrived at Download Mode press volume up. Open Odin3_v3.14.1.exe on your PC/Laptop:
Click on BL and select BL_xxxxxxxxxx.tar.md5
-Click on AP and select magisk_patched-24xxx_xxxxx.tar
-Click on CP and select CP_xxxxxxxxxx.tar.md5
(If you want to keep your data don't flash CSC).
-Click on CSC and select CSC_OMC_xxxxxxxxxx.tar.md5
-Click on USERDATA and select HOME_CSC_OMC_xxxxxxxxxx.tar.md5
When it finishes flashing it, it will automatically reboot and you can gain root access.
Optional: If you want to have the safety net passed (most of the banking apps use it), then you need to install the zip
as a Magisk module in Magisk https://github.com/kdrag0n/safetynet-fix/releases
How? Go to Magisk → Modules → install from storage and select the zip you downloaded.
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My S21 FE is rooted and camera still awesome. Don't know what you mean by broken but all I need is working like it should (pictures, vidéo, zoom, effects, pro...). To me, you can root without fear22
