Crash Recovery for the Samsung Galaxy A20 - Samsung Galaxy A20 Guides, News, & Discussion

Crash Recovery for the Samsung Galaxy A20
1. Be Prepared
Most of us will suffer from a crash at some time. If you know how to fix it, you will have a lot less stress.
There are certain files you need to keep in readiness.
Always backup boot, data, system before you try any new ROM.
A. On your PC
- Firmware you downloaded from one of these sites
https://samfrew.com or https://www.samfirmware.net
or for a faster download: https://forum.xda-developers.com/galaxy-a20/how-to/a20-repair-firmware-t4066551
- recovery.tar you can download from here https://forum.xda-developers.com/galaxy-a20/how-to/guide-quick-root-twrp-galaxy-a20-t4069423
B. On your A20 external sd
Don't keep any important files on your internal sd card. Keep backups on the external sd and on usb otg.
- Boot, data, system backup
- Disable_Dm-Verity_ForceEncrypt_08.18.2019.zip
or this one
View attachment 4975463
To go to download mode
Normal method
1. Turn off phone
2. Hold down both volume keys
3. Plug in computer
Bootlooping
1. Plug in to computer
2. Hold down both volume keys
For a difficult phone
1. Connect usb to computer but not to phone
2. Hold down all 3 keys
3. When it buzzes release power and quickly plug in usb to phone.
It might take a few times to get it right.
If it's REALLY BAD
1. Wait for the battery to completely run down and use normal method.
2. Soft Crash
This is when you get a bootloop.
Recover method
1. Reboot into TWRP( hold down all 3 keys and release vol down when it reboots)
2. Restore your backup.
3. Hard Crash
This is when you get red text along the top.
Recover method
1. Connect phone cord to PC
2. Reboot into download mode (Hold down all 3 keys
When the phone reboot release power key and plug in to computer at the same time
It may take a few times to get the timing right)
3. Flash each part of the firmware into its slot.
BL_20xxxxxxx.tar.md5 goes into the BL slot
AP_20xxxxxxx.tar.md5 goes into the AP slot
CP_20xxxxxxx.tar.md5 goes into the CP slot
HOME_CSC_xxxxxx.tar.md5 goes into the CSC slot
4. You might do a Factory data reset
5. Wait for the restart
6. Skip through a minimal setup
7. Activate developer mode
8. Allow usb debugging
9. Reboot into download mode
10. Flash recovery.tar in the AP slot
11. Reboot the A20 into TWRP and mount everything that you can.
12. Format Data (not just wipe) - don't restart
13. Flash Disable_Dm-Verity_ForceEncrypt
14. Wipe both caches then go back and Reboot into Recovery.
15. Restore your data backup.
16. Reboot
physwizz collection
A collection of guides, kernels and ROMs. Guides Complete Guide to the A20 GSIs for the A20 Quick Root and TWRP for the A20 Making my First Kernel for the A20 A20 Rooting Guide Making Your Own ROM Making Your Own Version of QwizzROM-a20...
forum.xda-developers.com

If anyone finds a better way to do this, please let me know.

physwizz said:
If anyone finds a better way to do this, please let me know.
Click to expand...
Click to collapse
Link to that version on dmverity pkease

shumway66 said:
Link to that version on dmverity pkease
Click to expand...
Click to collapse
Done,

I have FBE not present in TWRP recovery, is that a problem?

Engineer_Virus said:
I have FBE not present in TWRP recovery, is that a problem?
Click to expand...
Click to collapse
8. Reboot the A20 into TWRP and mount everything that you can.
9. Format Data (not just wipe)
10. Flash Disable_Dm-Verity_ForceEncrypt_08.18.2019.zip
11. Reboot into Recovery.

physwizz said:
8. Reboot the A20 into TWRP and mount everything that you can.
9. Format Data (not just wipe)
10. Flash Disable_Dm-Verity_ForceEncrypt_08.18.2019.zip
11. Reboot into Recovery.
Click to expand...
Click to collapse
Please how to boot manually to download mode? I have installed Carlos Kernel and my phone has black screen after Samsung boot logo.

Dan225 said:
Please how to boot manually to download mode? I have installed Carlos Kernel and my phone has black screen after Samsung boot logo.
Click to expand...
Click to collapse
turn phone off
connect to computer and hold down both volume keys
but for twrp mode
hold all 3 buttons until the phone reboots and release volume down

When it arrives at recovery it crashes and ends with error

jp_f said:
When it arrives at recovery it crashes and ends with error
Click to expand...
Click to collapse
More information

physwizz said:
Crash Recovery for the Samsung Galaxy A20
1. Be Prepared
Most of us will suffer from a crash at some time. If you know how to fix it, you will have a lot less stress.
There are certain files you need to keep in readiness.
Always backup boot, data, system before you try any new ROM.
A. On your PC
- Firmware you downloaded from one of these sites
https://samfrew.com or https://www.samfirmware.net
or for a faster download: https://forum.xda-developers.com/galaxy-a20/how-to/a20-repair-firmware-t4066551
- recovery.tar you can download from here https://forum.xda-developers.com/galaxy-a20/how-to/guide-quick-root-twrp-galaxy-a20-t4069423
B. On your A20 external sd
Don't keep any important files on your internal sd card. Keep backups on the external sd and on usb otg.
- Boot, data, system backup
- Disable_Dm-Verity_ForceEncrypt_08.18.2019.zip
or this one
View attachment 4975463
To go to download mode
Normal method
1. Turn off phone
2. Hold down both volume keys
3. Plug in computer
Bootlooping
1. Plug in to computer
2. Hold down both volume keys
For a difficult phone
1. Connect usb to computer but not to phone
2. Hold down all 3 keys
3. When it buzzes release power and quickly plug in usb to phone.
It might take a few times to get it right.
If it's REALLY BAD
1. Wait for the battery to completely run down and use normal method.
2. Soft Crash
This is when you get a bootloop.
Recover method
1. Reboot into TWRP( hold down all 3 keys and release vol down when it reboots)
2. Restore your backup.
3. Hard Crash
This is when you get red text along the top.
Recover method
1. Connect phone cord to PC
2. Reboot into download mode (Hold down all 3 keys
When the phone reboot release power key and plug in to computer at the same time
It may take a few times to get the timing right)
3. Flash each part of the firmware into its slot.
BL_20xxxxxxx.tar.md5 goes into the BL slot
AP_20xxxxxxx.tar.md5 goes into the AP slot
CP_20xxxxxxx.tar.md5 goes into the CP slot
HOME_CSC_xxxxxx.tar.md5 goes into the CSC slot
4. You might do a Factory data reset
5. Wait for the restart
6. Skip through a minimal setup
7. Activate developer mode
8. Allow usb debugging
9. Reboot into download mode
10. Flash recovery.tar in the AP slot
11. Reboot the A20 into TWRP and mount everything that you can.
12. Format Data (not just wipe) - don't restart
13. Flash Disable_Dm-Verity_ForceEncrypt
14. Wipe both caches then go back and Reboot into Recovery.
15. Restore your data backup.
16. Reboot
Click to expand...
Click to collapse
hello sir, i need help.
after rooting my phone succesfully and try to using eureka kernel my phone just get bootloop. before that, i dont know why i cannot backup data, system and etc you just write on guide. then i enter download mode and inadvertenly pressing "dont unlock bootloader". now my phone just stay in download mode with text writed on it in red colour "vbmeta: error verifying vbmeta image..."
if it can be fixed please tell me how to fix that. Thank you very much @

Astreinz said:
hello sir, i need help.
after rooting my phone succesfully and try to using eureka kernel my phone just get bootloop. before that, i dont know why i cannot backup data, system and etc you just write on guide. then i enter download mode and inadvertenly pressing "dont unlock bootloader". now my phone just stay in download mode with text writed on it in red colour "vbmeta: error verifying vbmeta image..."
if it can be fixed please tell me how to fix that. Thank you very much @
Click to expand...
Click to collapse
Try again.
This time use a long press to unlock

cant even boot into download mode or twrp i actually have a scv46 that is actually samsung a20 rip my phone

louiskaneko said:
cant even boot into download mode or twrp i actually have a scv46 that is actually samsung a20 rip my phone
Click to expand...
Click to collapse
For a difficult phone
1. Connect usb to computer but not to phone
2. Hold down all 3 keys
3. When it buzzes release power and quickly plug in usb to phone.
It might take a few times to get it right.
If it's REALLY BAD
1. Wait for the battery to completely run down and use normal method.

Related

[Q] Reset my Honor H60-L04 now no SD card

My H60-L04 was having so much trouble I factory reseted from CWM now my SD card is not detected some one please help.:crying:
How can I go back to the stock condition like out of the box condition.:crying:
To get back to stock condition, you must patient because there are quite a number of steps if you haven't already downloaded the files and prepared drivers before.
The steps:
In fast boot mode, flash stock recovery image.
Download and full stock ROM for you h6 model, uncompress it and copy dload folder to the root directory of a micro sdcard.
Insert the micro sdcard.
Apply three finger mode flash: power down phone, press and hold all vol up, vol down, and power buttons until it shows upgrading.
To flash in fast boot mode, you must prepare your PC with appropriate drivers. Fool proof installing huawei hisuite will install the necessary drivers.
You must also first download the stock recovery image and fast boot tools first and get to know the fastboot command to flash.
To boot into fast boot mode: power down, press and vol down and plug in usb cable.
dchsub said:
To get back to stock condition, you must patient because there are quite a number of steps if you haven't already downloaded the files and prepared drivers before.
The steps:
In fast boot mode, flash stock recovery image.
Download and full stock ROM for you h6 model, uncompress it and copy dload folder to the root directory of a micro sdcard.
Insert the micro sdcard.
Apply three finger mode flash: power down phone, press and hold all vol up, vol down, and power buttons until it shows upgrading.
To flash in fast boot mode, you must prepare your PC with appropriate drivers. Fool proof installing huawei hisuite will install the necessary drivers.
You must also first download the stock recovery image and fast boot tools first and get to know the fastboot command to flash.
To boot into fast boot mode: power down, press and vol down and plug in usb cable.
Click to expand...
Click to collapse
Thanks it worked :good:
But for some reason I can't use custom launchers like Nova,Apex .....
I'm not getting the option to choose between Hauwei home and custom launcher
L0GAN0 said:
Thanks it worked :good:
But for some reason I can't use custom launchers like Nova,Apex .....
I'm not getting the option to choose between Hauwei home and custom launcher
Click to expand...
Click to collapse
Definitely you can change the defaults. Only EMUI rom works a little differently.
Here it is: Settings > Manage apps > All > Look at the bottom the left icon "Default app settings" > Click in > Change default launcher

Fix any samsung android stucked at boot screen!

Hi guys in today's topic iam going to tell you that how you can fix any Samsung android phone that is stucked at booting screen.
It doesn't matter that in which point of boot you phone is stucked. It usually happen when you do something wrong while rooting, flashing, modifying, etc with your device. Do worry with the help of this post you will definitely fix your device. And if you have any questions you can comment down below.
So for fixing you device you have to flash a new firmware on your device using Odin.
**Firmware is a file or zip that contains all the partitions of you device.
**Odin is a flash tool that is use to flash firmware files on any Samsung.
1) Download Samsung usb driver from here and install it.
2)Now download Odin 3.07 from here and extract it on you pc. ( There are latest versions available for Odin but i recommend to use this 3.07 version because i think its easy to use and understand.
3) Then download you Samsung device firmware from here.
Now let's start the flashing process!
1) Remove you phone battery and reinsert if you haven't already. If you device battery is non-removable then it's ok.
2) Now press volume down+ home+ power button to boot into download mod.
3) Press volume up key to continue.
4) Now go to your pc and start odin.
5) Then connect your android device to your pc through usb cable. It's better to use the original usb cable that comes with your device.
6) After your device connected you can see "added" message in the Odin message box.
7) Now make sure that Auto reboot and f. time reset is checked and everything is unchecked. It's important!!!!
8) Then click on "PDA" and select the tar.md5 file (Stock firmware) that you have downloaded.
9) And then just click on start to start the flashing process.
** It will take some time to flash and just sit back don't touch your phone or usb.
10) After that you will see a reset or pass message in Odin. You can now disconnect your phone.
11) After that you phone will boot it will take some time to boot for the first time.
12) Sometimes phone still don't start after flashing the stock firmware because the phone has some corrupt data and cache. So if this happen to you the just go to recovery by pressing volume up+ home+ power and then just factory reset your device and clear the cache and then click on reboot.
** In some device when you clear cache fron recovery it doesn't clear it and just reboot the device automatically. If this happen to then the its totally fine.
After that your phone will definitely boot and fixed!!!
So now you can use your device again.
**You can also check my video tutorial!

ROOT J2 PRIME (SM-G532 F/M/G) SUPEREASY 5 steps

now i was looking for how to root my j2 prime because its what i use to login with my vpn then i use a proxy server on it to route all traffic connected to it while its in hotspot mode but it seems proxy servers have their limitations and so im forced to root so i can just hotspot the vpn directly with an app, but after searching i found 3 methods all using superSU which im not comfortable with anymore, all with many steps but in my experice since this phone has got nothing to lose i decided to experiment and boom it worked...
what you need
latest Magsisk - v17.1 at this time of posting
latest SAMSUNG USB DRIVERS
ODIN
and TWRP by
ashyx said:
STEPS
1. BOOT PHONE IN DOWNLAOD MODE (power+vold-down+home)
2. FLASH TWRP in the AP OPTION in ODIN (untick auto reboot;very important) then after flash succeeds
3. Pull out battery and boot to recovery (power+vol-up+home)
4. FLASH MAGISK.zip from your SDCARD (Recovery wont be able to mount internal storage so make sure to put the MAGISK.zip in your SDCARD)
5. Reboot and Hello systemless root
credits to this thread where i was searching for root, includes link to 3 methods but mine is the shortest and easiest
Click to expand...
Click to collapse
I'm unable to start recovery mode. I pull out the battery and after pressing the keys the phone simply goes off. Also I'm unable to enter recovery mode anyway (after turning it off and not flashing anything). That's it, I can't enter stock recovery either.
I tried all button combinations and it just doesn't enter recovery mode.
Never mind, it was probably a faulty button. Pressing with force did the trick. I however employed a bit different path (or perhaps I wrote it down more detailed), which come out more noob like, I'll leave them here for anyone that might use them
Noob, baby steps to root the Samsung Galaxy J2 Prime SM-G532M:
1. Enable developer mode and selected OEM unlocking and USB debug, dunno if it's needed but I did it because in all roots I have seen this is a must.
2. Put the Magisk zip onto a SD card (currently Magisk-v18.0) and put the SD card into the phone. Then I turned off the phone.
3. Turn on the phone into download mode (power+vold-down+home), connect the phone to the PC.
4. Open ODIN and FLASH TWRP file using the AP button (VERY IMPORTANT, uncheck the auto reboot in options, otherwise the recovery goes back to stock I think and the phone will boot into the regular OS, and you'll have to flash TWRP again), wait a few seconds to the flash to finish (odin says PASS! in green).
5. From this screen without touching anything reboot the phone into recovery mode (power+vol-up+home) (just in case press hard the vol+ key). If it boots the phone in regular mode, do steps 2 , 3 and 4 again.
6. FLASH MAGISK.zip from the microSD. When finished wipe Delvik/Cache.
7. Reboot the system. Open the Magisk app (you might have to wait a few seconds for it to appear among on the apps) then press yes when prompted to finish installation as many times (2 times I think). And done, you have your phone rooted.
PD: Magisk can be found here: https://github.com/topjohnwu/Magisk/releases/
As for the TWRP file (twrp_3.1.0-1_sm-g532_5617b.tar), use the one in the link on the OP.
LordBaal19 said:
6. FLASH MAGISK.zip from the microSD. When finished wipe Delvik/Cache.
7. Reboot the system. Open the Magisk app (you might have to wait a few seconds for it to appear among on the apps) then press yes when prompted to finish installation as many times (2 times I think). And done, you have your phone rooted..
Click to expand...
Click to collapse
why am i getting an error? it says
"Updater process ended with ERROR: 1
Error installing zip file '/external_sd/Magisk-v17.1.zip' "
can i get some help here?
Good day!
Is disabling dm-verity and force encryption included in the process?
And also, everything works fine but how is that i cannot delete system apps manually? They're returning back after reboot.
Thanks.
Unable to detect the phone -win nor Lin
Hello guys
Something really extrange is happening.
My j2 prime -532G- can't be detected by Windows nor Linux.
The usb is working because it charges the phone, but I can't access the phone at all. I checked all the drivers in Win -google/adb and samsung- and in Linux libmtp/heimdall/etc.
I have tryed different usb -not the original one since i lost it-
Even when i start the download mode, nothing happens.
it there a way to root the phone without a PC? i have tryed also kingroot apk but it is useless.
Thanks
LordBaal19 said:
I'm unable to start recovery mode. I pull out the battery and after pressing the keys the phone simply goes off. Also I'm unable to enter recovery mode anyway (after turning it off and not flashing anything). That's it, I can't enter stock recovery either.
I tried all button combinations and it just doesn't enter recovery mode.
Never mind, it was probably a faulty button. Pressing with force did the trick. I however employed a bit different path (or perhaps I wrote it down more detailed), which come out more noob like, I'll leave them here for anyone that might use them
Noob, baby steps to root the Samsung Galaxy J2 Prime SM-G532M:
1. Enable developer mode and selected OEM unlocking and USB debug, dunno if it's needed but I did it because in all roots I have seen this is a must.
2. Put the Magisk zip onto a SD card (currently Magisk-v18.0) and put the SD card into the phone. Then I turned off the phone.
3. Turn on the phone into download mode (power+vold-down+home), connect the phone to the PC.
4. Open ODIN and FLASH TWRP file using the AP button (VERY IMPORTANT, uncheck the auto reboot in options, otherwise the recovery goes back to stock I think and the phone will boot into the regular OS, and you'll have to flash TWRP again), wait a few seconds to the flash to finish (odin says PASS! in green).
5. From this screen without touching anything reboot the phone into recovery mode (power+vol-up+home) (just in case press hard the vol+ key). If it boots the phone in regular mode, do steps 2 , 3 and 4 again.
6. FLASH MAGISK.zip from the microSD. When finished wipe Delvik/Cache.
7. Reboot the system. Open the Magisk app (you might have to wait a few seconds for it to appear among on the apps) then press yes when prompted to finish installation as many times (2 times I think). And done, you have your phone rooted.
PD: Magisk can be found here: https://github.com/topjohnwu/Magisk/releases/
As for the TWRP file (twrp_3.1.0-1_sm-g532_5617b.tar), use the one in the link on the OP.
Click to expand...
Click to collapse
I can't seem to get this phone to go into recovery after flashing TWRP. It always goes into a normal reboot no matter how hard i press the button combination.
Any idea about how to make it reboot to recovery any other way
BTW I was aable to make it go to TWRP Once but forgot to insert the SD card that time and had to repeat the process again and haven't been able to see that TWRP screen agin
Any ideas
mbalino said:
Win -google/adb and samsung- and in Linux libmtp/heimdall/etc.
Click to expand...
Click to collapse
Hello mbalino I am new to XDA forums
Where did you checked the drivers in the phone or the PC? what drivers are they?
mbalino said:
My j2 prime -532G- can't be detected by Windows nor Linux.
The usb is working because it charges the phone,
Click to expand...
Click to collapse
Did the phone trigger an Autoplay window (to ask you if you want "view files", "import media", etc.)
Did the phone appear in the file explorer (as a media player device?) with storage(s)?

Basic guide to Installing TWRP, Root and ROM via ODIN on S7 amd S7 edge

Hey everyone.
I have recently rooted and installed the Pixel experience 9 custom ROM on my S7 edge.
Even though I am confident in Installing ROMs and using TWRP I always like to have a check on the net to see the best way of doing stuff. When checking I found that there were so many different guides that the process became more confusing than it needed to be and it caused issues when I was trying install the ROM.
So I have decided to write out a guide to help everyone in the future.
Note. I am in UK using a Exynos version of the S7 edge. I believe there is a complication with the USA Snapdragon version.
Also this is done at your own risk and I am not responsible for any damage, errors or bricked devices. This will also void the warranty of your device.
What will you need
1. A computer with a SD card slot (if you don't have a slot you can usb a usb adaptor)
2. The latest version of ODIN
3. Your chosen ROM zip
4. Magisk Root zip
5. The correct TWRP file for your S7 or S7 edge
6.The latest version of your Stock firmware (this is in case something goes wrong)
7. A spare micro SD card with SD card adaptor
8. Micro USB cable (charging cable usually does the job)
9. Samsung Device drivers
This guide will be split in to 4 parts with some additional notes at the end.
Part 1- on your PC
Part 2- on your mobile
Part 3- In ODIN mode
Part 4- In TWRP
On your PC
1. Download and install the latest version of ODIN to your PC. https://samsungodin.com/
2. Download and install the Samsung Device drivers.
3. Download the correct TWRP version for your phone. https://twrp.me/
4. Now Download your root file, I used to Magisk root but there is super SU as well. I was told that Super SU is dated compared to Magisk.
https://www.xda-developers.com/magisk-v17-1-android-pie-a-b-support/
5. Now download your chosen ROM. There is lots of different ROMs for the S7 and S7 edge. In my case I decided to go with Pixel experience 9, it's basically a Pixel 3 ROM that runs Android P but it's up to you.
6. Go to Sammobile and download the stock Firmware for your device. The download takes ages so I would just leave this download in the background and continue to the next step (You shouldn't need this file but you will need it something goes wrong)
https://www.sammobile.com/firmwares/
7. Put your micro SD into your adaptor then insert into your PC into your SD card slot, then copy the ROM Download and the Root download SD card to the card.
8. Open ODIN and put the TWRP file on the AP section, then uncheck re-partition.
On Your Phone.
1. Before plugging up to the PC there are something to do first. The first thing to do is enter developer options by taping build number 7 times. Then check USB debugging and then check OEM unlocking.
2. Back up your data with Samsung backup and Google backup, both found in the settings.
3. If you already have a SD card inside your phone remove it and put it somewhere safe.
4. Power off your device and Boot in to ODIN mode (volume down, home button and power at the sametime)
In ODIN mode (READ THIS CAREFULLY)
1. BEFORE pressing start on your computer, hold volume up and home button.
2. Now press start on the computer, keep your fingers on the volume button up button and home button. Let the PC and Phone start it's process.
3. The moment the phone screen goes black. Press and hold the power but while keeping your fingers on the volume up and home button.
4. Keep all the buttons held down (volume up, home button and power button) till you see the TWRP screen boot.
In TWRP.
1. Once TWRP boots you will see a screen it will say "swipe to allow modifications" DON'T swipe just press "read only"
2. Press wipe and then press format data. Once the wipe is complete DO NOT swipe to reboot. (You will get yourself stuck in a boot loop) press the TWRP home icon instead.
3. Press Reboot then press recovery this will complete the installation of TWRP (if you press anything else you will get stuck in a boot loop)
4. Allow TWRP to reboot. You will be presented with the "swipe allow modifications" check the do not show again box and swipe.
5. Now insert your Micro SD card with the downloaded files.
6. Press wipe, then press advanced and check cashe and
dalvik cashe. Then Press TWRP Home icon
7. Press install and navigate to SD card. Then press the on the Magisk file and swipe, allow the process to finish and press wipe cache and Dalvik cashe.
8. Press TWRP home icon and press install and navigate back to SD card. Then press your ROM file and swipe again. Once it's finished press wipe cashe and Dalvik cashe. Then swipe to reboot.
9. Re-insert your memo card you were using before. (Not the one with the downloads on, the one with your photos and music and stuff)
10. BOOM your done. Happy days with your new ROM.
Few last things
the ROM I installed had G-apps preinstalled with the ROM, but if your ROM has no G-apps then once you booted, download G-apps from your ROMs browser and flash them with TWRP.
If you get stuck in a boot loop use your stock firmware file and Odin to reinstall the stock firmware and try the whole process again.
This method uses SD card to install the files in TWRP but I believe you can just copy the files via your PC directly to your phone at point 5 in the TWRP part of the guide. I had a spare card so I used a card.
The principal of this guide can be applied to other Samsung devices but newer device then the S7 and S7 edge have more factors to take note of, so some research will be required.
Remember
this is done at your own risk and I am not responsible for any damage, errors or bricked devices. This will also void the warranty of your device.
Hope this guide works well for you.
Is the "no verty" not required to remove encryption?
ctbale said:
Is the "no verty" not required to remove encryption?
Click to expand...
Click to collapse
I don't think this was a big issue with S7E but I know the S8 and onwards have extra encryption protection and 24 hour jailbait locks.
I have rooted my S7E a few times and it's never been an issue for me.
Sometimes the USA Snapdragon versions have extra encryption as well.
Thanks for reply.
In a few days I will try to root.
Fingers Crossed!
( I do have the Exynos S7 Edge G935F)
Also have a newer stock Oreo 8.0.0, unrooted. Thats the part I hear is giving people problems. Something about after flashing TWRP you get a fail to mount the data partition .... or something like that. Something to do with quotas
Heimdell vs odin
I wonder why most people use odin.
The official lineage OS installation instruction recommends heimdell. https://wiki.lineageos.org/devices/hero2lte/install
So what is the difference ? Heimdell vs odin
ZionMainframe said:
I wonder why most people use odin.
The official lineage OS installation instruction recommends heimdell. https://wiki.lineageos.org/devices/hero2lte/install
So what is the difference ? Heimdell vs odin
Click to expand...
Click to collapse
ODIN is made by Samsung developers and Hiemdell is a 3rd party option. They both do the same thing but some say that Heimdell is safer, easier and faster.
Personally I use Odin because I have got used to it and it has never let me down.
I mostly use it to install Stock UK firmware on cheaper Samsung phones that are from overseas.
Hello,
Thanks for your guide but I think there are too much steps, you can do it easier.
You can keep your sd card in the phone to transfer the ROM and magisk.
You can uncheck reboot in Odin instead doing this hard combination of "keep pressing volume up and power + press start on your computer at the same time", or let reboot checked, pressing start and keep pressing power+home+volume up when the screen turning off.
Even if you're in a bootloop, you can go back in recovery by forcing the phone to reboot (power+home+volume down) and when you see the Samsung logo (splahscreen) you keep pressing power+home+volume up until you see twrp screen appears.
Sorry men, it's not against you or your guide but to help beginners, we are always scared when we see a long and complicate list of steps, especially when we don't know.
But it's nice to share the links of the necessary tools to avoid searching everywhere :good:
And don't worry guys, if you do something wrong you can easily restore the stock firmware, it's very hard to brick a Samsung device, just be sure to get the last version of TWRP for the good model and the ROM corresponding to this model too.
I flashed my S7Edge the day I bought it without stress, take your time, read the tutorials and try to understand what you are going to do before doing it and all will be fine.
The simple version (IDK if it's better) is :
1 : Install Samsung drivers
2 : Copy ROM + magisk + noverity zips on sdcard
3 : Go into download mode (Power off phone and keep pressing power+home+volume down until the blue screen and follow the steps on the screen)
4 : Open Odin (last version), connect your phone to the computer, uncheck reboot box and flash TWRP on AP case
5 : Reboot on TWRP (keep pressing power+home+volume down until you see Samsung logo, and directly keep pressing power+home+volume up until you see TWRP screen)
6 : Wipe everything except sdcard + format data + (optionally) flash noverity zip
7 : Flash the ROM
8 : Reboot to system, configure the rom and wait some minutes to let the ROM create dalvik cache.
9 : Reboot normally and wait some minutes.
10 : Reboot to TWRP
11 : Flash Magisk zip (IMPORTANT ! Don't Flash Magisk just after the ROM, first boot on the ROM without root and reboot one time at least before to avoid lags in the system due to dalvik cache ! Steps 7 and 8)
12 : Reboot to system and install magisk manager apk
13 : I'm not superstitious but there is not step 13, you are done, enjoy !
Don't forget, don't flash Magisk directly after the ROM or you'll get a laggy ROM.
Just boot without flashing magisk and let the ROM doing his work in background during some minutes (5 to 10 minutes should be good), and do another reboot.
After that you can flash Magisk.
Use links shared by the creator of this topic, they are the officials. :victory:
psylooooo said:
Hello,
Thanks for your guide but I think there are too much steps, you can do it easier.
You can keep your sd card in the phone to transfer the ROM and magisk.
You can uncheck reboot in Odin instead doing this hard combination of "keep pressing volume up and power + press start on your computer at the same time", or let reboot checked, pressing start and keep pressing power+home+volume up when the screen turning off.
Even if you're in a bootloop, you can go back in recovery by forcing the phone to reboot (power+home+volume down) and when you see the Samsung logo (splahscreen) you keep pressing power+home+volume up until you see twrp screen appears.
Sorry men, it's not against you or your guide but to help beginners, we are always scared when we see a long and complicate list of steps, especially when we don't know.
But it's nice to share the links of the necessary tools to avoid searching everywhere :good:
And don't worry guys, if you do something wrong you can easily restore the stock firmware, it's very hard to brick a Samsung device, just be sure to get the last version of TWRP for the good model and the ROM corresponding to this model too.
I flashed my S7Edge the day I bought it without stress, take your time, read the tutorials and try to understand what you are going to do before doing it and all will be fine.
The simple version (IDK if it's better) is :
1 : Install Samsung drivers
2 : Copy ROM + magisk + noverity zips on sdcard
3 : Go into download mode (Power off phone and keep pressing power+home+volume down until the blue screen and follow the steps on the screen)
4 : Open Odin (last version), connect your phone to the computer, uncheck reboot box and flash TWRP on AP case
5 : Reboot on TWRP (keep pressing power+home+volume down until you see Samsung logo, and directly keep pressing power+home+volume up until you see TWRP screen)
6 : Wipe everything except sdcard + format data + (optionally) flash noverity zip
7 : Flash the ROM
8 : Reboot to system, configure the rom and wait some minutes to let the ROM create dalvik cache.
9 : Reboot normally and wait some minutes.
10 : Reboot to TWRP
11 : Flash Magisk zip (IMPORTANT ! Don't Flash Magisk just after the ROM, first boot on the ROM without root and reboot one time at least before to avoid lags in the system due to dalvik cache ! Steps 7 and 8)
12 : Reboot to system and install magisk manager apk
13 : I'm not superstitious but there is not step 13, you are done, enjoy !
Don't forget, don't flash Magisk directly after the ROM or you'll get a laggy ROM.
Just boot without flashing magisk and let the ROM doing his work in background during some minutes (5 to 10 minutes should be good), and do another reboot.
After that you can flash Magisk.
Use links shared by the creator of this topic, they are the officials. :victory:
Click to expand...
Click to collapse
Cheers for helping my out, my guide has a lot of steps as I literally wrote what I did every step.
I was going for a guide that spelt out every single detail for the less experienced people. I glad to see you approve of my links.
Great guide though, great that both guides can complement each others.
Owenboy89 said:
Cheers for helping my out, my guide has a lot of steps as I literally wrote what I did every step.
I was going for a guide that spelt out every single detail for the less experienced people. I glad to see you approve of my links.
Great guide though, great that both guides can complement each others.
Click to expand...
Click to collapse
You are right ! And your guide is more complete than mine, I don't talk about going into developers options to enable oem unlock etc, I wrote this too fast and too late :laugh:
Does this process work for latest March 1 2019 security patch?
Build number is G935FXXS4ESC6.
Thanks!
stenoo said:
Does this process work for latest March 1 2019 security patch?
Build number is G935FXXS4ESC6.
Thanks!
Click to expand...
Click to collapse
It does work
https://www.mediafire.com/folder/ka5kcad3w7awo/S7+
Hey are you sure it doesn't work for snapdragon?
SULkiller said:
Hey are you sure it doesn't work for snapdragon?
Click to expand...
Click to collapse
You can use this method for Snapdragon, but Snapdragon phones in certain regions have a built jailbreak that can complicate things. There are ways around it but as I am in a region that sell exynos then i have no experience with the Snapdragon Variant. ?
hey when i try flash galaxy s7edge sm-g935f with twrp when i go into recovery it red screen what am i doing wrong cheers inadvance
3 time flashing stock grrrrrrrrr
1337-oxide said:
hey when i try flash galaxy s7edge sm-g935f with twrp when i go into recovery it red screen what am i doing wrong cheers inadvance
3 time flashing stock grrrrrrrrr
Click to expand...
Click to collapse
When you booted into recovery the for the first time after installing it, did you wipe all your data??
Then go into reset and pressed reset to recovery???
Owenboy89 said:
When you booted into recovery the for the first time after installing it, did you wipe all your data??
Then go into reset and pressed reset to recovery???
Click to expand...
Click to collapse
i got twrp and root know ressuruction remix giving me error 7 i think what does that mean
cheers
---------- Post added at 04:40 PM ---------- Previous post was at 04:35 PM ----------
sorry but know i lost twrp what am i doing wrong SM-G935F s7edge
is anyone going to help me or u just like the other sites dont reply i need this info asap its only reason i rooted was to use custom rom oh also turmux
Hey
Sorry I have been busy.
Best option is to flash the firmware and start again. Follow the steps of original comment.
Remember when you boot in to TWRP straight after installing it...then wipe all your data then press reboot and reboot back into RECOVERY....once your done this you have completed the install of TWRP.
Once that is all done....wipe your cashe davalik data and then insert your memory card with the custom Rom and Magisk root inside. Install Magisk first...then the ROM.
Once this is done wipe cashe/davalik data once more and reboot, your custom ROM should load up...once the ROM loads install the Magisk root manager and latest update for the root.
Other things to check have you installed the correct TWRP and correct custom Rom for your device.
Also check your customs ROM feed on XDA to see if anyone has issued like this on there as well, if so there might be specific answer to your issue there.
Hope this helps sorry for the delay
How can you switch back to root version of rom for Samsung Galaxy S7 Edge
You can install original ROM / firmware of Samsung Galaxy S7 Edge follow these simple steps :
1. Download and install the latest SamsungOdin 3 software
2. Now download ROM of S7 edge from sammobile.com .
3. Switch off your phone and connect your phone with PC using data cable.
4. Press Power+Vol down and home key together.
5. Now select recovery from your phone boost setup.
6. Open the Odin and select your phone and browse the ROM file.
7. Now press install ROM. Almost done!
8. Wait to complete installation it may take 10 - 15 minutes.
9. Enjoy!
psylooooo said:
Hello,
Thanks for your guide but I think there are too much steps, you can do it easier.
You can keep your sd card in the phone to transfer the ROM and magisk.
You can uncheck reboot in Odin instead doing this hard combination of "keep pressing volume up and power + press start on your computer at the same time", or let reboot checked, pressing start and keep pressing power+home+volume up when the screen turning off.
Even if you're in a bootloop, you can go back in recovery by forcing the phone to reboot (power+home+volume down) and when you see the Samsung logo (splahscreen) you keep pressing power+home+volume up until you see twrp screen appears.
Sorry men, it's not against you or your guide but to help beginners, we are always scared when we see a long and complicate list of steps, especially when we don't know.
But it's nice to share the links of the necessary tools to avoid searching everywhere :good:
And don't worry guys, if you do something wrong you can easily restore the stock firmware, it's very hard to brick a Samsung device, just be sure to get the last version of TWRP for the good model and the ROM corresponding to this model too.
I flashed my S7Edge the day I bought it without stress, take your time, read the tutorials and try to understand what you are going to do before doing it and all will be fine.
The simple version (IDK if it's better) is :
1 : Install Samsung drivers
2 : Copy ROM + magisk + noverity zips on sdcard
3 : Go into download mode (Power off phone and keep pressing power+home+volume down until the blue screen and follow the steps on the screen)
4 : Open Odin (last version), connect your phone to the computer, uncheck reboot box and flash TWRP on AP case
5 : Reboot on TWRP (keep pressing power+home+volume down until you see Samsung logo, and directly keep pressing power+home+volume up until you see TWRP screen)
6 : Wipe everything except sdcard + format data + (optionally) flash noverity zip
7 : Flash the ROM
8 : Reboot to system, configure the rom and wait some minutes to let the ROM create dalvik cache.
9 : Reboot normally and wait some minutes.
10 : Reboot to TWRP
11 : Flash Magisk zip (IMPORTANT ! Don't Flash Magisk just after the ROM, first boot on the ROM without root and reboot one time at least before to avoid lags in the system due to dalvik cache ! Steps 7 and 8)
12 : Reboot to system and install magisk manager apk
13 : I'm not superstitious but there is not step 13, you are done, enjoy !
Don't forget, don't flash Magisk directly after the ROM or you'll get a laggy ROM.
Just boot without flashing magisk and let the ROM doing his work in background during some minutes (5 to 10 minutes should be good), and do another reboot.
After that you can flash Magisk.
Use links shared by the creator of this topic, they are the officials. :victory:
Click to expand...
Click to collapse
Your certainly not wrong there. confusing isn't the word I would choose more like frustrating to hell. I'm new to this and I can't even get out the starting gate lol every time I move one step forward I move two steps back and that's no joke.
I can't read any more tutorials there coming out my ears it's just adding to the confusion I'm completely lost now. can't even pick a custom rom that's a headache for another time I was just wanting to root the phone but was told stock roms are temperamental and custom roms was the way forward. all I keep reading is tutorials telling you to down load files but never a mentioning once if they should be in zip format as downloaded or unpacked? then providing links to other files taht are in apk file! like Magisk. but continue to about the file as though it were a zip! as noob it's frustrating to keep asking for help and every key stroke at least for me anyway you feel like a pain in the rear! so for now I'm throwing in the towel at least I know one thing that works. giving up lol.

[SM-A750FN/DS] Unofficial LineageOS 17.1 GSI

Hi everyone,
I had dozen of problems getting my SM-A750FN/DS with the newest Stock Rom to run any GSI Rom, until I tried something that did the trick. Since there are a couple people here, who can't get it running, too, I decided to write a little Guide. Do all things in the right order and it should work. Since I only have the SM-A750FN/DS, I can't promise, that it will work on other SM-A750X devices.
First of all: I am not responsible for anything you do to your device. This guide worked for me, it doesn't have to work for you.
Working so far:
- Calling
- WIFI
- Sensors (All)
Working partially:
- Cam
Doesn't work so far:
- Bluetooth
- Memory Card
- USB File Transfer
Before you start with anything, get this things on your SD-Card:
1. Quantum Stock 2.5 Latest Release (OneUI edition, not the GSI!)
2. LineageOS 17.1 Arm 64 BvS (Extract the XZ and copy the IMG to the SD)
EDIT: Updating to the newest GSI Rom works through TWRP! Just choose the newest LineageOS BvS, extract it and copy it on your device. Install the Image and choose ONLY System. After the reboot you will be up-to-date. Tested with LineageOS 17.1 15.06.2021 GSI Rom (AllArch).
Good, now we need to make sure, that you have the STOCK ROM running on your Phone. If not, download the newest Samsung Stock and flash it with ODIN 3.14.4.
1. Download ODIN 3.14.4
2. Start ODIN.
3. Click on AP and choose the Samsung Stock Image (DO NOT CLICK ANYTHING ELSE!)
4. Start on your phone the bootloader (normally it is VOLUME DOWN + POWER button, when you phone is off).
5. If that didn't start the bootloader, try VOLUME UP + POWER and choose Start Bootloader in the menu.
6. Connect your phone to your computer through a USB cable.
7. Click Start in Odin (on your computer).
8. Wait for the phone to start into Android.
9. Close ODIN
10. Connect your phone to the internet and put a SIM inside (without this your OEM Unlocking option won't appear)
11. Enable Developer options in settings. Normally found after click about 10 times on Build in Settings ---> About Phone. (Here you can also see, that your phone uses OneUI 2.0.)
12. In the developer options you enable OEM Unlocking (this will delete everything on your phone - like a factory wipe).
13. Restart your phone and check if OEM Unlocking is enabled. If it doesn't appear, you are not connected to the internet and your sim card is not unlocked.
Now you are ready to start the flashing of the new ROM.
1. Download TWRP by ashyx.
2. Power Off your phone and load it into bootloader/download mode.
3. Start ODIN, click on AP, choose the ZIP file containing TWRP, click on Options and DISABLE Auto-Reboot (VERY IMPORTANT!).
4. Click on Start in ODIN and wait until it shows PASS.
5. On your phone hold VOLUME DOWN + POWER, until the phone shuts off, IMMEDIATELY hold VOLUME UP + POWER, so the phone can start TWRP.
6. In TWRP go on WIPE, FORMAT DATA and type yes.
7. When it is done, go on the Menu button (arrow showing up), go on Reboot and on Recovery. DO NOT POWER OFF THE PHONE OR RESTART IT TO SYSTEM!!!
8. After the phone rebooted into TWRP go on Install.
9. Click on INSTALL IMAGE.
10. Choose lineage-17.1-20201114-UNOFFICIAL-treble_arm64_bvS.img.
11. Flash it.
12. After flashing is done, go back to menu (DO NOT RESTART THE PHONE YET!)
13. Go on Install and choose Quantum-Quack-A750F-V2.5-ONEUI.zip and flash it.
14. Wipe Dalvik Cache and restart the phone to system.
15. The phone will restart twice, on the second restart LineageOS will start.
You don't need magisk, since the Quantum Kernel is prerooted. If you wish to, try to install Magisk. DO NOT WIPE THE STOCK ROM!
For anyone ending up with problems:
ERROR: Download Mode shows "Only original firmware..."
Solution: You didn't check, if OEM Unlocking is enabled. IT IS NECESSARY TO CONNECT THE INTERNET AND SIM CONNECTION!
ERROR: Bootloop
Solution: Reflash the stock rom from Samsung and try the tutorial again. This time read more careful and don't miss anything. It is important, that your ABOUT PHONE says, that you have ONEUI.
ERROR: LineAgeOS doesn't boot.
Solution: Be sure, that it says BvS in the filename. AvS doesn't work, since Samsung changed the phone from a-only to A/B. Be sure to check if it is ARM64!
Special Thanks to:
@prashantp01 for the great Quantum Kernel 2.5!
@ashyx great working TWRP build!
@AndyYan for the unofficial ALLARCH LineAgeOS GSI. Works great so far.
Nice U took your time to write that long post... However 3/4 of that is copy-pasted from elsewhere...
I would like to suggest something to solve aome of your issues (especially those from DOESN'T WORK) and also TO WARN other users of following such guides.
Bluetooth and USB transfer - man, U simply use wrong kernel! It is not @prashantp01 fanaberie to provide 2 kernel versions, it is done for the purpose. OneUI contains a lib which breaks bluetooth....... GSI version contains file which is needed for USB thing...... Regarding Magisk - U should not use official Magisk which is included in Quantum kernel for GSI roms, please take some research to find correct version dedicated to GSIs... U took (or actually waste) plenty of time for this post as it NOT NECESSARY to do all mention above steps... As simple as:
from OneUI 2.0 - wipe data, dalvik/art and cache, flash gsi system.img, flash Quantum GSI kernel, flash CORRECT Magisk. IMPORTANT: DON'T WIPE SYSTEM OR MOSTLY LIKE U FACE BOOTLOOP.
from any gsi - wipe dalvik/art and cache, flash choosen gsi system.img, flash CORRECT Magisk, done.
That works for 4 months to most users - those who can't successfully boot makes a mistake on some stage.
Please have in mind U share your thoughts to few millions of people and by saying 'You take no responsibility' doesn't mean U are allowed to post ANYTHING.
I hope A750xx Users can take this as a lesson and will use their brains before following any random guide.
Have a nice day!
PS. USE UNOFFICIAL ORANGEFOX FOR FLASHING ON SAR DEVICE, AS MENTIONED TWRP IS PIE SOURCE AND DOESN'T WORK CORRECT ANYMORE ....
Besides the Filesystem (USB + SDCard) and Bluetooth everything works fine. Even Magisk works like it should.
So where is the problem with this way?
Wolve-San said:
Hi everyone,
I had dozen of problems getting my SM-A750FN/DS with the newest Stock Rom to run any GSI Rom, until I tried something that did the trick. Since there are a couple people here, who can't get it running, too, I decided to write a little Guide. Do all things in the right order and it should work. Since I only have the SM-A750FN/DS, I can't promise, that it will work on other SM-A750X devices.
First of all: I am not responsible for anything you do to your device. This guide worked for me, it doesn't have to work for you.
Working so far:
- Calling
- WIFI
- Sensors (All)
Working partially:
- Cam
Doesn't work so far:
- Bluetooth
- Memory Card
- USB File Transfer
Before you start with anything, get this things on your SD-Card:
1. Quantum Stock 2.5 Latest Release (OneUI edition, not the GSI!)
2. LineageOS 17.1 Arm 64 BvS (Extract the XZ and copy the IMG to the SD)
Good, now we need to make sure, that you have the STOCK ROM running on your Phone. If not, download the newest Samsung Stock and flash it with ODIN 3.14.4.
1. Download ODIN 3.14.4
2. Start ODIN.
3. Click on AP and choose the Samsung Stock Image (DO NOT CLICK ANYTHING ELSE!)
4. Start on your phone the bootloader (normally it is VOLUME DOWN + POWER button, when you phone is off).
5. If that didn't start the bootloader, try VOLUME UP + POWER and choose Start Bootloader in the menu.
6. Connect your phone to your computer through a USB cable.
7. Click Start in Odin (on your computer).
8. Wait for the phone to start into Android.
9. Close ODIN
10. Connect your phone to the internet and put a SIM inside (without this your OEM Unlocking option won't appear)
11. Enable Developer options in settings. Normally found after click about 10 times on Build in Settings ---> About Phone. (Here you can also see, that your phone uses OneUI 2.0.)
12. In the developer options you enable OEM Unlocking (this will delete everything on your phone - like a factory wipe).
13. Restart your phone and check if OEM Unlocking is enabled. If it doesn't appear, you are not connected to the internet and your sim card is not unlocked.
Now you are ready to start the flashing of the new ROM.
1. Download TWRP by ashyx.
2. Power Off your phone and load it into bootloader/download mode.
3. Start ODIN, click on AP, choose the ZIP file containing TWRP, click on Options and DISABLE Auto-Reboot (VERY IMPORTANT!).
4. Click on Start in ODIN and wait until it shows PASS.
5. On your phone hold VOLUME DOWN + POWER, until the phone shuts off, IMMEDIATELY hold VOLUME UP + POWER, so the phone can start TWRP.
6. In TWRP go on WIPE, FORMAT DATA and type yes.
7. When it is done, go on the Menu button (arrow showing up), go on Reboot and on Recovery. DO NOT POWER OFF THE PHONE OR RESTART IT TO SYSTEM!!!
8. After the phone rebooted into TWRP go on Install.
9. Click on INSTALL IMAGE.
10. Choose lineage-17.1-20201114-UNOFFICIAL-treble_arm64_bvS.img.
11. Flash it.
12. After flashing is done, go back to menu (DO NOT RESTART THE PHONE YET!)
13. Go on Install and choose Quantum-Quack-A750F-V2.5-ONEUI.zip and flash it.
14. Wipe Dalvik Cache and restart the phone to system.
15. The phone will restart twice, on the second restart LineageOS will start.
You don't need magisk, since the Quantum Kernel is prerooted. If you wish to, try to install Magisk. DO NOT WIPE THE STOCK ROM!
For anyone ending up with problems:
ERROR: Download Mode shows "Only original firmware..."
Solution: You didn't check, if OEM Unlocking is enabled. IT IS NECESSARY TO CONNECT THE INTERNET AND SIM CONNECTION!
ERROR: Bootloop
Solution: Reflash the stock rom from Samsung and try the tutorial again. This time read more careful and don't miss anything. It is important, that your ABOUT PHONE says, that you have ONEUI.
ERROR: LineAgeOS doesn't boot.
Solution: Be sure, that it says BvS in the filename. AvS doesn't work, since Samsung changed the phone from a-only to A/B. Be sure to check if it is ARM64!
Special Thanks to:
@prashantp01 for the great Quantum Kernel 2.5!
@ashyx great working TWRP build!
@AndyYan for the unofficial ALLARCH LineAgeOS GSI. Works great so far.
Click to expand...
Click to collapse
Bro plz help. I instal lineagos arm64 ab gsi using twrp with gsi kernal phone restarting at samsung a7 2018 logo why not booting any android 11 rom i tried also arm64 a also arm try all gsi i also use boot fix zip but same problem plz bro rply me what is this problem plzz fix
Farhansolangi said:
Bro plz help. I instal lineagos arm64 ab gsi using twrp with gsi kernal phone restarting at samsung a7 2018 logo why not booting any android 11 rom i tried also arm64 a also arm try all gsi i also use boot fix zip but same problem plz bro rply me what is this problem plzz fix
Click to expand...
Click to collapse
Sorry for the late reply. Sounds like you got a bootloop. Just read the guide. I gave a solution to any problem I encountered.
Voytec83 said:
PS. USE UNOFFICIAL ORANGEFOX FOR FLASHING ON SAR DEVICE, AS MENTIONED TWRP IS PIE SOURCE AND DOESN'T WORK CORRECT ANYMORE ....
Click to expand...
Click to collapse
Can you PM me the link?
What is the link?
Voytec83 said:
flash CORRECT Magisk
Click to expand...
Click to collapse
What is the link for correct Magisk?
Voytec83 said:
flash CORRECT Magisk
Click to expand...
Click to collapse
Where to find CORRECT Magisk, any clues?
Thank you so much for this tutorial! Was looking for a long time.
ludemon said:
Where to find CORRECT Magisk, any clues?
Click to expand...
Click to collapse
Use Magisk 21.4. Newer versions bricked my device!
Wolve-San said:
Hi everyone,
I had dozen of problems getting my SM-A750FN/DS with the newest Stock Rom to run any GSI Rom, until I tried something that did the trick. Since there are a couple people here, who can't get it running, too, I decided to write a little Guide. Do all things in the right order and it should work. Since I only have the SM-A750FN/DS, I can't promise, that it will work on other SM-A750X devices.
First of all: I am not responsible for anything you do to your device. This guide worked for me, it doesn't have to work for you.
Working so far:
- Calling
- WIFI
- Sensors (All)
Working partially:
- Cam
Doesn't work so far:
- Bluetooth
- Memory Card
- USB File Transfer
Before you start with anything, get this things on your SD-Card:
1. Quantum Stock 2.5 Latest Release (OneUI edition, not the GSI!)
2. LineageOS 17.1 Arm 64 BvS (Extract the XZ and copy the IMG to the SD)
EDIT: Updating to the newest GSI Rom works through TWRP! Just choose the newest LineageOS BvS, extract it and copy it on your device. Install the Image and choose ONLY System. After the reboot you will be up-to-date. Tested with LineageOS 17.1 15.06.2021 GSI Rom (AllArch).
Good, now we need to make sure, that you have the STOCK ROM running on your Phone. If not, download the newest Samsung Stock and flash it with ODIN 3.14.4.
1. Download ODIN 3.14.4
2. Start ODIN.
3. Click on AP and choose the Samsung Stock Image (DO NOT CLICK ANYTHING ELSE!)
4. Start on your phone the bootloader (normally it is VOLUME DOWN + POWER button, when you phone is off).
5. If that didn't start the bootloader, try VOLUME UP + POWER and choose Start Bootloader in the menu.
6. Connect your phone to your computer through a USB cable.
7. Click Start in Odin (on your computer).
8. Wait for the phone to start into Android.
9. Close ODIN
10. Connect your phone to the internet and put a SIM inside (without this your OEM Unlocking option won't appear)
11. Enable Developer options in settings. Normally found after click about 10 times on Build in Settings ---> About Phone. (Here you can also see, that your phone uses OneUI 2.0.)
12. In the developer options you enable OEM Unlocking (this will delete everything on your phone - like a factory wipe).
13. Restart your phone and check if OEM Unlocking is enabled. If it doesn't appear, you are not connected to the internet and your sim card is not unlocked.
Now you are ready to start the flashing of the new ROM.
1. Download TWRP by ashyx.
2. Power Off your phone and load it into bootloader/download mode.
3. Start ODIN, click on AP, choose the ZIP file containing TWRP, click on Options and DISABLE Auto-Reboot (VERY IMPORTANT!).
4. Click on Start in ODIN and wait until it shows PASS.
5. On your phone hold VOLUME DOWN + POWER, until the phone shuts off, IMMEDIATELY hold VOLUME UP + POWER, so the phone can start TWRP.
6. In TWRP go on WIPE, FORMAT DATA and type yes.
7. When it is done, go on the Menu button (arrow showing up), go on Reboot and on Recovery. DO NOT POWER OFF THE PHONE OR RESTART IT TO SYSTEM!!!
8. After the phone rebooted into TWRP go on Install.
9. Click on INSTALL IMAGE.
10. Choose lineage-17.1-20201114-UNOFFICIAL-treble_arm64_bvS.img.
11. Flash it.
12. After flashing is done, go back to menu (DO NOT RESTART THE PHONE YET!)
13. Go on Install and choose Quantum-Quack-A750F-V2.5-ONEUI.zip and flash it.
14. Wipe Dalvik Cache and restart the phone to system.
15. The phone will restart twice, on the second restart LineageOS will start.
You don't need magisk, since the Quantum Kernel is prerooted. If you wish to, try to install Magisk. DO NOT WIPE THE STOCK ROM!
For anyone ending up with problems:
ERROR: Download Mode shows "Only original firmware..."
Solution: You didn't check, if OEM Unlocking is enabled. IT IS NECESSARY TO CONNECT THE INTERNET AND SIM CONNECTION!
ERROR: Bootloop
Solution: Reflash the stock rom from Samsung and try the tutorial again. This time read more careful and don't miss anything. It is important, that your ABOUT PHONE says, that you have ONEUI.
ERROR: LineAgeOS doesn't boot.
Solution: Be sure, that it says BvS in the filename. AvS doesn't work, since Samsung changed the phone from a-only to A/B. Be sure to check if it is ARM64!
Special Thanks to:
@prashantp01 for the great Quantum Kernel 2.5!
@ashyx great working TWRP build!
@AndyYan for the unofficial ALLARCH LineAgeOS GSI. Works great so far.
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Thank you for your post! I have successfully installed LineageOS on my device. I want to add - when someone wants to download LineageOS, it must be Android 10 (with One UI 2.0) with firmware version from November 2020. How to choose correct firmware for your device is explained here: https://www.xda-developers.com/how-to-update-samsung-galaxy-smartphone/
Now I cannot transfer USB files to PC. Windows doesnt detect phone, Linux can (sometimes) but I can do nothing with it. USB debugging is on and Transfer Files options is enabled. I tried different ports, but it happens nothing. Does someone have an idea what I should do?

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