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i have been trying to install stock Lollipop on my device. i have followed both http://www.androidpit.com/how-to-get-android-5-0-lollipop-on-the-galaxy-note-3 and http://techbeasts.com/2015/02/14/update-galaxy-note-4-n910f-android-501-lollipop-official/ to the letter. This is also my fourth or fifth time using Odin. Every attempt has failed. i have tried Odin 3.10, 3.09, and 3.07 and got the same results:
Code:
<ID:0/006> File analysis..
<ID:0/006> SetupConnection..
<ID:0/006> Initialzation..
<ID:0/006> Get PIT for mapping..
<ID:0/006> Firmware update start..
<ID:0/006> sbl1.mbn
<ID:0/006> NAND Write Start!!
<ID:0/006>
<ID:0/006> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)
My phone's download screen gave thisd message:
Code:
Secure Check Fail : sbl1
until i switched from "N9005XXUGBOB6_N9005XEOGBOA4_XEO" to "N9005XXUGBOA5_N9005XEOGBOA4_XEO" and also freezing any anti-theft app that may be locking my device somehow. Now the screen says:
Code:
Secure Check Fail : aboot
i am rooted (running Omega 24) and to be sure, i re-flashed auto-root
i have tried 4 different USB cables
No USB hubs, i am connected directly to my PC
Firewall, AntiVirus, and Anti Malware software are all off.
i have run Odin as admin
Reactivation Lock is not ticked
Some other things me screen says that may be of some help are:
Code:
QUALCOMM SECUREBOOT: ENABLE
followed by some coupling of letters and numbers and:
Code:
Write Protection: Enable
i am hoping that a factory reset can be my very last resort. i am contemplating reflashing my current Omega ROM and then retrying this.
Any ideas?
EDIT: Factory Reset did not change anything
Is your device unlocked or branded?
Joku1981 said:
Is your device branded or unlocked?
Click to expand...
Click to collapse
It should be unlocked. i unlocked it a while ago when i flashed my first ROM. i have been flashing Omega roms ever since. i cannot imagine my phone would lock itself back up...
billybag said:
It should be unlocked. i unlocked it a while ago when i flashed my first ROM. i have been flashing Omega roms ever since. i cannot imagine my phone would lock itself back up...
Click to expand...
Click to collapse
Odin gave you fail in the NAND. This mean that you have lost plenty of files in EFS. Try to restore your OMEGA backup.
Joku1981 said:
How you unlocked it? By IMEI or other method?
Click to expand...
Click to collapse
Damn, i don't remember. It seemed so long ago. i don;t suppose there is a way to check...
EDIT: while attempting a restore of a nandroid backup, i noticed something. The following backup files were missing:
.android_secure.vfat.tar and
.android_secure.vfat.tar.a
i REALLY appreciate your time and help, by the way. This is so frustrating. One person told me that they repartitioned and selected bootloader when they flashed, but was not advising me to do so.
billybag said:
i REALLY appreciate your time and help, by the way. This is so frustrating. One person told me that they repartitioned and selected bootloader when they flashed, but was not advising me to do so.
Click to expand...
Click to collapse
Do you have any EFS backup?
billybag said:
i REALLY appreciate your time and help, by the way. This is so frustrating. One person told me that they repartitioned and selected bootloader when they flashed, but was not advising me to do so.
Click to expand...
Click to collapse
If you want to flash stock LP, I would just bite the bullet and do it and first get a working system. Then install Recovery and re-root - I use TWRP.tar file so I can flash it in Odin and the SuperSU zip file that I then flash in Recovery.
You don't say which N3 you have but are you sure you have the right ROM for it?
Did you turn off the phone and remove the battery for a bit THEN go into download mode?
Are you using v3.09 of ODin PC?
I've done mine twice for other reasons since LP came out - I untick the auto-reboot so after I flash the stock firmware I can flash TWRP - then it's boot into Recovery and install my custom ROM (I use Temasek's CM12) PA GApps and the SuperSU.zip, then set up the phone - usually I then Restore only Data from my latest TWRP backup but on occasion I've DL'd Titanium from Ply and used that to Restore my apps from extSD.
Journyman16 said:
If you want to flash stock LP, I would just bite the bullet and do it and first get a working system. Then install Recovery and re-root - I use TWRP.tar file so I can flash it in Odin and the SuperSU zip file that I then flash in Recovery.
You don't say which N3 you have but are you sure you have the right ROM for it?
Did you turn off the phone and remove the battery for a bit THEN go into download mode?
Are you using v3.09 of ODin PC?
I've done mine twice for other reasons since LP came out - I untick the auto-reboot so after I flash the stock firmware I can flash TWRP - then it's boot into Recovery and install my custom ROM (I use Temasek's CM12) PA GApps and the SuperSU.zip, then set up the phone - usually I then Restore only Data from my latest TWRP backup but on occasion I've DL'd Titanium from Ply and used that to Restore my apps from extSD.
Click to expand...
Click to collapse
That is what i am having problems with. i know how to flash custom roms. i was also able to flash stock KK when it came out. It is stock lollipop that i cannot get to flash. i am using an SM-n9005 (tmobile). i am going to try different firmware downloads (CSCs) and see what that does.
Also, i have tried Odin versions 3.07, 3.09, and 3.10
billybag said:
That is what i am having problems with. i know how to flash custom roms. i was also able to flash stock KK when it came out. It is stock lollipop that i cannot get to flash. i am using an SM-n9005 (tmobile). i am going to try different firmware downloads (CSCs) and see what that does.
Also, i have tried Odin versions 3.07, 3.09, and 3.10
Click to expand...
Click to collapse
Do you know your original firmware? I'm wondering because some versions have different sized partitions and flashing another type causes fails. i.e. I had a HK S3 and had to flash a PIT file before I could use European firmware. Might it be something along those lines?
Have practically the same situation...
The furthest I've got is the following
Code:
<ID:0/003> Initialzation..
<ID:0/003> Get PIT for mapping..
<ID:0/003> Firmware update start..
<ID:0/003> sbl1.mbn
<ID:0/003> aboot.mbn
<ID:0/003> rpm.mbn
<ID:0/003> tz.mbn
<ID:0/003> sdi.mbn
<ID:0/003> NON-HLOS.bin
<ID:0/003> boot.img
<ID:0/003> recovery.img
<ID:0/003> system.img.ext4
<ID:0/003> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)
But again, with any version of odin and any firmware (lollipop or kitkat) i'm trying to flash, it stucks with
Code:
<ID:0/003> Complete(Write) operation failed.
PS I also have
Code:
QUALCOMM SECUREBOOT: ENABLE
Write Protection: Enable
and my phone was originally locked to spanish vodafone.
Sorry for the delay. i just got around to giving it another shot and it worked. i found an official, made for TMOBILE, version of the firmaware.
Code:
N900TUVUFOB6_N900TTMBFOB6_TMB
for anyone else that may be having trouble. You can find it here: http://www.sammobile.com/firmwares/download/43850/N900TUVUFOB6_N900TTMBFOB6_TMB/
i was using n9005 firmwares, which is usually fine except int his case i needed a tmo one.
Thanks again for everyone's input. Hopefully this post can help someone else out now.
Hi, my brother-in-law tried to root his phone but probably didn't know what he was doing with Odin and Kies. I tried to restore the phone with Kies3 but the phone is not recognized and I can't get a recovery code. I've tried the default option of booting into recovery mode and flashing with Odin as Administrator. I'm flashing following a guide on this forum using [Auto Reboot] [F. Reset Time] checked in the options and loading [AP] [CP] [CSC] first. Others have commented not to use the [BL] file. The problem is when I try to flash it fails and I get this message:
<ID:0/007> Odin engine v(ID:3.1100)..
<ID:0/007> File analysis..
<ID:0/007> SetupConnection..
<ID:0/007> Initialzation..
<ID:0/007> Get PIT for mapping..
<ID:0/007> Firmware update start..
<ID:0/007> SingleDownload.
<ID:0/007> boot.img
<ID:0/007> NAND Write Start!!
<ID:0/007> recovery.img
<ID:0/007> system.img.ext4
<ID:0/007> FAIL! (Auth)
<ID:0/007>
<ID:0/007> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)
Click to expand...
Click to collapse
On the screen of the phone it says:
UDC START
SYS REV CHECK FAIL : Refer 3 > Binary 1
SECURE CHECK FAIL : system
Click to expand...
Click to collapse
I've tried everything I could flashing each one by one [BL] [AP] [CP] and [CSC]. Apparently the only one that successfully flashed through was [CP]. The phone can boot into recovery mode fine, when I start the phone normally it just hangs on the Samsung Galaxy S5 screen. Any help in the right direction would be appreciated. I have pretty much GoogledFu'd all the information I can and am using the stock Samsung Galaxy S5 SM-G900A firmware. I have tried different USB ports, the stock Samsung USB cable, and an LG USB cable and that didn't help either.
To flash the firmware using Odin you need to put the phone in Download mode (Power + home + volume down) and not recovery mode. Select PDA/AP in Odin, select the firmware and then click start.
DigitalBeating said:
Hi, my brother-in-law tried to root his phone but probably didn't know what he was doing with Odin and Kies. I tried to restore the phone with Kies3 but the phone is not recognized and I can't get a recovery code. I've tried the default option of booting into recovery mode and flashing with Odin as Administrator. I'm flashing following a guide on this forum using [Auto Reboot] [F. Reset Time] checked in the options and loading [AP] [CP] [CSC] first. Others have commented not to use the [BL] file. The problem is when I try to flash it fails and I get this message:
On the screen of the phone it says:
I've tried everything I could flashing each one by one [BL] [AP] [CP] and [CSC]. Apparently the only one that successfully flashed through was [CP]. The phone can boot into recovery mode fine, when I start the phone normally it just hangs on the Samsung Galaxy S5 screen. Any help in the right direction would be appreciated. I have pretty much GoogledFu'd all the information I can and am using the stock Samsung Galaxy S5 SM-G900A firmware. I have tried different USB ports, the stock Samsung USB cable, and an LG USB cable and that didn't help either.
Click to expand...
Click to collapse
Yes, I already have done that and the only thing that writes successfully is the [CP] file. It fails to write to the NAND and does a FAIL! (Auth). Not sure what else I can do.
Alright I think I figured exactly what he did to the phone. Apparently AT&T locked the bootloader on Lollipop and his phone got upgraded to Lollipop while he was sleeping. So he tried to use Odin to flash the AP for the older KitKat back onto the S5 and this softbricked the phone. As far as I have read there is no way to downgrade back currently to KitKat to get root access. I'm trying to look for stock firmware for Lollipop but I can't find anything for this model. I assume if I flash it back to the latest Lollipop version functionality will be restored. Someone said something about flashing a kernel but I don't know. Not really sure what to do now since I can't find official Samsung S5 SM-G900A firmware to flash back either through the recovery or through Odin.
DigitalBeating said:
Alright I think I figured exactly what he did to the phone. Apparently AT&T locked the bootloader on Lollipop and his phone got upgraded to Lollipop while he was sleeping. So he tried to use Odin to flash the AP for the older KitKat back onto the S5 and this softbricked the phone. As far as I have read there is no way to downgrade back currently to KitKat to get root access. I'm trying to look for stock firmware for Lollipop but I can't find anything for this model. I assume if I flash it back to the latest Lollipop version functionality will be restored. Someone said something about flashing a kernel but I don't know. Not really sure what to do now since I can't find official Samsung S5 SM-G900A firmware to flash back either through the recovery or through Odin.
Click to expand...
Click to collapse
I am currently in the same boat. Please tell me you found a fix for this and if so, what was it? Any help is greatly appreciated.
@DigitalBeating and @Theamazingcorey
Here is an AT&T lollipop firmware.....
https://www.androidfilehost.com/?fid=24591000424940454
G900AUCU4COI5_ATT4COI5_v5.1.1_Repair_Firmware
I found it (by chance) on a Russian hosting site. They say it's a 'repair' firmware which means it is more than likely going to be more than one file (it'll probably be bootloader, modem and OS) So you'll have to load each file into it's respective Odin 'slot'.
If I understand how repair firmwares work, it should wipe and format the data partitions (instead of simply overwriting them) as it flashes. This will give the best chance of a successful flash.....
http://i.imgur.com/rVnFwJM.jpg
I cannot thank you enough, that seems to have fixed my problem. I though I was going to be stuck with a paperweight, lol.
Would you happen to know if there is a way to root the the AT&T S5 with 5.1.1?
Glad it worked fella.....
With regards to rooting, everything I've read on XDA indicates AT&T Lollipop can't be rooted....and the possibility of downgrading to achieve root is non existent.......
But there's a LOT if information on XDA, and I'll be the first to admit that I haven't read it all........
http://i.imgur.com/rVnFwJM.jpg
@Theamazingcorey just out of interest, can you confirm what files were inside the zip?
http://i.imgur.com/rVnFwJM.jpg
Thanks for the info. Sorry I was not able to get back to you sooner, I've been slammed these last couple of days. Have family coming into town this evening and between work and getting ready for their visit, I haven't had time to think straight, lol.
Hi, when trying to flash my Verizon S7 back to stock (with the correct verizon files) I got this odin log
<ID:0/003> Odin engine v(ID:3.1203)..
<ID:0/003> File analysis..
<ID:0/003> SetupConnection..
<ID:0/003> Initialzation..
<ID:0/003> Set PIT file..
<ID:0/003> DO NOT TURN OFF TARGET!!
<ID:0/003> Get PIT for mapping..
<ID:0/003> Firmware update start..
<ID:0/003> SingleDownload.
<ID:0/003> boot.img
<ID:0/003> recovery.img
<ID:0/003> system.img.ext4
<ID:0/003> FAIL! (Auth)
<ID:0/003>
<ID:0/003> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)
When trying to exit I got the "Software Update Failed" and when trying to flash again it's just a stuck bar on my screen. Not sure what to do and I'm kinda of new to this but I'd appreciate any help. Since then my phone has been stuck on the green screen since and whenever I press anything it just returns to the screen.
Any fast help would really be appreciated, it's been like this for hours and I'm not sure what to do ):
I'm gonna take a quick stab at this and say use the other CSC file, whichever one you haven't tried (either csc_vzw or home_csc_vzw).
Do not use the HOME_CSC file. Use the CSC and be sure that all of the images are in the correct spots in ODIN.
Was the device rooted? If so, you may not have gotten rid of all the root files, so it detects modified and won't flash.
Which firmware are you trying to flash? Were you on Nougat? We need more information.
Are you going from U firmware? I had to check repartition when I did.
ironbesterer said:
Do not use the HOME_CSC file. Use the CSC and be sure that all of the images are in the correct spots in ODIN.
Was the device rooted? If so, you may not have gotten rid of all the root files, so it detects modified and won't flash.
Which firmware are you trying to flash? Were you on Nougat? We need more information.
Click to expand...
Click to collapse
I was rooted through the steps found here
https://forum.xda-developers.com/ve...-to-notes-root-install-xposed-unroot-t3411039
I tried to flash back to stock and got the error after that. My phone's battery died and it's just sitting on my desk now );
Sayunoi said:
I was rooted through the steps found here
https://forum.xda-developers.com/ve...-to-notes-root-install-xposed-unroot-t3411039
I tried to flash back to stock and got the error after that. My phone's battery died and it's just sitting on my desk now );
Click to expand...
Click to collapse
Same thing here. I can only get into stock recovery with the error "dm-verity verification failed" (most options are disabled), and into bootloader, but unable to flash stock ROM; it just fails every time.
I'd be glad for a solution!
Don't forget the bootloader file too. I believe the root thread doesn't include the BL file in the instructions, but the error disappeared when I included the Bootloader.
azoller1 said:
Don't forget the bootloader file too. I believe the root thread doesn't include the BL file in the instructions, but the error disappeared when I included the Bootloader.
Click to expand...
Click to collapse
Mine still has the error when I included the bootloader file.
Another thing I should mention is in the top right it says "SW REV CHECK FAIL : [system] Fused 3 > Binary 1
I tried changing the wire, using the boot loader file, and changing usb ports. Lost here );
Sayunoi said:
When trying to exit I got the "Software Update Failed"
Click to expand...
Click to collapse
I tried going back to stock as well and am stuck on this screen. It says to use the Verizon Software Repair Assistant on a computer to repair it. I've only ever rooted a kindle fire so I don't know too much. Any way I can just get my phone back to normal?
JaffXsMan said:
I tried going back to stock as well and am stuck on this screen. It says to use the Verizon Software Repair Assistant on a computer to repair it. I've only ever rooted a kindle fire so I don't know too much. Any way I can just get my phone back to normal?
Click to expand...
Click to collapse
Really wondering the same thing =/
I think maybe I'm trying to flash back to an older version. Does anyone have a link for the latest Galaxy S7 stock rom?
Sayunoi said:
I think maybe I'm trying to flash back to an older version. Does anyone have a link for the latest Galaxy S7 stock rom?
Click to expand...
Click to collapse
You cannot flash a stock rom with an older bootloader than what ever you currently have on your phone. You can only Odin flash a stock rom with same or newer bootloader. So usually you cannot go to an older rom only newer.
Can I try flashing stock rom while in the Software update failed screen, or do I need to be in download mode?
Sayunoi said:
I tried changing the wire, using the boot loader file, and changing usb ports. Lost here );
Click to expand...
Click to collapse
Try re-downloading the firmware. Are you sure you had the right firmware downloaded? The error seems to be caused by some kind of mismatch between the software trying to be flashed and what software you currently have on your phone
Also, make sure you are using the non princecosmy Odin 3.12
When ever I try to flash stock onto my phone, i'm getting the error "SW REV CHECK FAILED : [aboot] fused 4 > binary 2" I don't know what any of this means. Could someone explain this? Also when trying to flash stock i'm in "System Update Failed" screen and a little bar appears at the bottom. Does this mean it is still able to download the stock rom at all? One last thing, if I were to try and flash G935U instead of G935V could that help? Any help would be nice
go to samfirm and download the latest firmware for the S7 that you have, try flashing with that. I had to put everything in it's place in odin and select reformat to unroot my phone. I ran into the dm_verification failed and the only option was to download the latest firmware and flash that.
JerseyDubbin said:
go to samfirm and download the latest firmware for the S7 that you have, try flashing with that. I had to put everything in it's place in odin and select reformat to unroot my phone.
Click to expand...
Click to collapse
Do you mean sammobile? https://www.sammobile.com/firmwares/database/SM-G935F/
That or http://samfirm.net/I believe.
I was going through the posts and realized how helpful you were to a noob like me who helped me to install a stock custom rom i think i forgot to turn off the updates or something apprently my phone was initially stuck in bootloader the atnt now it wont even show the atnt logo keeping my fingers crossed that i havent screwed my phone
My phone can go in the android system recovery <3e>
LRX22C. I337UCUGOC3
if i am not wrong i cant just install any custom rom since bootloader is still locked i dont know for sure
in the screen below
#manual mode#
--applying multi-csc
applied the csc-code: ATT
Successfully applied multi - CSC
what have i tried uptill now
just wipe data/factory reset
can you help ?
Can you get into recovery mode? If it is just stuck booting to download mode only, then it sounds like you need to ODIN back to stock or use a debrick image. Your bootloader is locked so no TWRP recovery can be installed. You can use flash fire, which is like safe strap sort of, but your phone has to be booted into Android for it to work.
StoneyJSG said:
Can you get into recovery mode? If it is just stuck booting to download mode only, then it sounds like you need to ODIN back to stock or use a debrick image. Your bootloader is locked so no TWRP recovery can be installed. You can use flash fire, which is like safe strap sort of, but your phone has to be booted into Android for it to work.
Click to expand...
Click to collapse
i can get into recovery tried to sideload a rom gives some footer error
y2kyasir said:
i can get into recovery tried to sideload a rom gives some footer error
Click to expand...
Click to collapse
and signature verification error
StoneyJSG said:
Can you get into recovery mode? If it is just stuck booting to download mode only, then it sounds like you need to ODIN back to stock or use a debrick image. Your bootloader is locked so no TWRP recovery can be installed. You can use flash fire, which is like safe strap sort of, but your phone has to be booted into Android for it to work.
Click to expand...
Click to collapse
can you help ??
maybe i am installing not the appropriate rom ?
y2kyasir said:
can you help ??
maybe i am installing not the appropriate rom ?
Click to expand...
Click to collapse
You are on the OC3 bootloader right? Try to install golden eye ROM, which is touchwiz based. Since the bootloader is locked, you can only install touchwiz based ROMs and I think Google play edition ROMs. Trying to install cyogen mod or any other AOSP ROM won't work. Have you tried finding the debrick image or the stock ODIN tar file? With all those errors, I would try one of those routes.
StoneyJSG said:
You are on the OC3 bootloader right? Try to install golden eye ROM, which is touchwiz based. Since the bootloader is locked, you can only install touchwiz based ROMs and I think Google play edition ROMs. Trying to install cyogen mod or any other AOSP ROM won't work. Have you tried finding the debrick image or the stock ODIN tar file? With all those errors, I would try one of those routes.
Click to expand...
Click to collapse
i am on on nb1 since i did try to get it back to stock rom i found in the forums bootloader is locked i dont know about the debrick image but i am sure i did flash the stock odin tar from odin
i had no error everything went smoothly on odin 0 fail
i did download the rom put it odin everything went fine
<ID:0/005> SingleDownload.
<ID:0/005> aboot.mbn
<ID:0/005> sbl1.mbn
<ID:0/005> sbl2.mbn
<ID:0/005> sbl3.mbn
<ID:0/005> rpm.mbn
<ID:0/005> tz.mbn
<ID:0/005> boot.img
<ID:0/005> recovery.img
<ID:0/005> persdata.img.ext4
<ID:0/005> system.img.ext4
<ID:0/005> modem.bin
<ID:0/005> NON-HLOS.bin
<ID:0/005> cache.img.ext4
<ID:0/005> hidden.img.ext4
<ID:0/005> RQT_CLOSE !!
<ID:0/005> RES OK !!
<ID:0/005> Remain Port .... 0
<OSM> All threads completed. (succeed 1 / failed 0)
<ID:0/005> Removed!!
StoneyJSG said:
You are on the OC3 bootloader right? Try to install golden eye ROM, which is touchwiz based. Since the bootloader is locked, you can only install touchwiz based ROMs and I think Google play edition ROMs. Trying to install cyogen mod or any other AOSP ROM won't work. Have you tried finding the debrick image or the stock ODIN tar file? With all those errors, I would try one of those routes.
Click to expand...
Click to collapse
and i know you are a pro so you can drag my noob ass out of this situation
Have you tried this thread?
http://forum.xda-developers.com/showthread.php?t=2674223
Is that the file you flashed in ODIN for NB1?
I'm no Android developer or anything, I just know the basic stuff. Most of what I know I learned from the XDA forums here.
StoneyJSG said:
Have you tried this thread?
http://forum.xda-developers.com/showthread.php?t=2674223
Is that the file you flashed in ODIN for NB1?
I'm no Android developer or anything, I just know the basic stuff. Most of what I know I learned from the XDA forums here.
Click to expand...
Click to collapse
yes https://forum.xda-developers.com/showthread.php?t=2674223
yes the rootable odin stock
but not the non root one
is there any specific time you guys are around so i dont have to wait days sorry a bit anxious to get my phone up and going
I am here off and on while I am at work Monday thru Friday 12 p.m. to 6 p.m. though my times will vary.
Hi, good afternoon, I have an SM-A205YN imported from vodafone and I want to unlock it for use in my country so I want to use a SM-A205G rom, I'm trying to flash a SM-A205G rom by odin3 v3.14.4 and I'm getting the following error: re-partition operation failed I'm on Windows 10, AMD c 60 processor with 8gb ram I've tried flashing with the "re-partition" box checked and also with the "re-partition" box unchecked, if anyone can help me I'll be forever grateful
Wendellsilva2408 said:
Hi, good afternoon, I have an SM-A205YN imported from vodafone and I want to unlock it for use in my country so I want to use a SM-A205G rom, I'm trying to flash a SM-A205G rom by odin3 v3.14.4 and I'm getting the following error: re-partition operation failed I'm on Windows 10, AMD c 60 processor with 8gb ram I've tried flashing with the "re-partition" box checked and also with the "re-partition" box unchecked, if anyone can help me I'll be forever grateful
Click to expand...
Click to collapse
First, before using Odin and doing other stuff, including flashing, you should unlock the bootloader. Have you followed any guide to do so, but it did not work?
The first steps are to click build number 10 times, open developer options, select OEM unlock and USB debugging, restart the phone and go to recovery mode and see if you have a bootloader unlock option...
If this does not work, you can try using the Magisk app. For this: download the app, download the firmware for you phone on the pc (which will be a .zip file), extract boot.img from it, copy that on the phone, use that file in Magisk and let the app patch it and flash with Odin (AP) the resulting patched Magisk file.
But in order to receive any help, you need to tell us exactly what step did not work for you...
By the way, unlocking the bootloader erases all data on the phone, so do a back-up beforehand.
Hi, my bootloader is already unlocked and USB debugging is enabled,I try to flash the system through odin3 but I get this error:
<ID:0/004> Odin engine v(ID:3.1401)..
<ID:0/004> File analysis..
<ID:0/004> Total Binary size: 5605 M
<ID:0/004> SetupConnection..
<ID:0/004> Initialzation..
<ID:0/004> Set PIT file..
<ID:0/004> DO NOT TURN OFF TARGET!!
<ID:0/004>
<ID:0/004> Re-Partition operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)
No, do not flash the custom rom using Odin. Flash with Odin only the TWRP (TeamWin Custom Recovery Project) on the AP. If I am not mistake, there is an official version for A20. If not, there is certainly an unofficial version. TWRP is device specific. Do not install TWRP for another device or you risk bricking your device.
After flashing TWRP, go to recovery (TWRP) and see if you can see the custom recovery file before installing anything. Also, having the device connected by usb to a pc running windows and having all samsung drivers installed, you should see on your pc the contents of your phone.
Only then, wipe dalvik, cache, data and system (=also called clean flash).
If you see a bunch of encripted folders and files in TWRP, you need to first format data, then wipe, than move the custom recovery file from pc to phone, find it in twrp and flash.
Then restart to system.
If anything happends wrong, you should have on your pc the stock rom firmaware for your specific phone. Go to bootloader and flash it with Odin to save your phone.