Database Develop

[GUIDE][G900F] UPDATE TO G900FXXU1ANG2 + ROOT + KNOX 0x0

After several hours of research, fails, and a lot of hard work, I've found a way to upgrade your Galaxy S5 (G900F ONLY!) to the newest firmware (G900FXXU1ANG2), keeping root and knox counter on 0x0. And I decided to share it with you guys!
I tried this method with my device and worked flawlessly.
-If you already updated your firmware to ANG2 and didn't get root, you can downgrade to ANE2 (WON'T TRIP KNOX), root, and then follow this method. UPDATE: Or you can do it in a much easier way with THIS AWESOME AND EASIER METHOD (Post & Method by my friend @wajiman)
Notes:
-Make sure you have your S5 already rooted. (You can make this with Towelroot: https://towelroot.com/, this method will keep Knox 0x0) (Thanks @geohot for towelroot)
-Make sure of having at least 70% battery for security issues.
-Make sure you have BUSYBOX installed.
-Make sure KNOX is DISABLED.
-Make sure of having USB DEBUGGING ENABLED on developer options.
-Disable reactivation lock if it's switched on.
-I'M NOT RESPONSIBLE FOR ANY DAMAGE/BRICK ON YOUR DEVICE, THIS STEPS ARE 100% CORRECT, BUT IF YOU DO SOMETHING WRONG IT'S YOUR FAULT.
1. First you need to download the firmware. http://www.sammobile.com/firmwares/3/?download=32652
2. Extract the md5 file and copy it to your EXTERNAL SDCARD.
3. Flash it with MOBILE ODIN PRO. (YOU NEED THE PRO VERSION OR YOU WON'T KEEP ROOT)
https://play.google.com/store/apps/details?id=eu.chainfire.mobileodin.pro&hl=es
-Make sure you select the file in "Open File"
-Make sure you select the "Reboot into download mode after flashing" (THIS IS VERY IMPORTANT!)
-DO NOT select the Wipe Dalvik Cache Option. (As some users are reporting that probably Mobile ODIN Pro has a bug on flashing boots straightly into download mode instead of flashing, didn't happen to me though)
-Make sure you have the "Everroot" option ticked (FOR KEEPING ROOT)
4. After flash, you should now be on Download Mode, connect your device to your PC and on Odin, flash this 2 files:
Bootloader ANG2: BL_G900FXXU1ANG2.tar.md5 https://www.dropbox.com/s/tdiu7rc3tbr02j9/BL_G900FXXU1ANG2.tar.md5
Modem ANG2: CP_G900FXXU1ANG2.tar.md5 https://www.dropbox.com/s/rl3gh2ppvi4c9ty/CP_G900FXXU1ANG2.tar.md5
-On odin place the bootlaoder on BL and modem on CP.
-Make sure Re-partition is NOT TICKED.
-Make sure Auto Reboot is NOT TICKED.
-Make sure F. Reset Time IS TICKED.
5. After Odin finishes flashing, disconnect your device and BOOT INTO RECOVERY. (Home+Vol Up+Power)
6. On recovery, wait until it finishes applying the csc files.
7. Reboot.​
That's it. Any question on the comments. If I can answer it, I WILL.
Please press that THANKS BUTTON IF THIS HELPS! :good: :victory:
You can also "buy me a beer" if you really want to, I'm currently unemployed so you would seriously help me out... "DONATE TO ME" button is on the left under my username,
"You probably paid $500US for your phone, think in the value that's added with root and this method." :angel:

You forgot to mention to disable reactivation lock if it's switched on or else Mobile Odin gets stucked in 2nd recovery AFAIK

Whoops!
wajiman said:
You forgot to mention to disable reactivation lock if it's switched on or else Mobile Odin gets stucked in 2nd recovery AFAIK
Click to expand...
Click to collapse
You're right! Sorry my bad, it's my first post...
Already edited.

hmm, strange, for me it first booted into download mode and i dont think it flashed the firmware at all. now it keeps on booting into download mode
EDIT:
@aguarello i repeated these steps 3 times already, i think there is a step which is missing because it keeps on booting into download mode no matter what i do.j
Found the issue:
i think its a bug in mobile odin. if you have selected "Wipe Dalvik Cache." the phone straight away boots into download mode without flashing the firmware and stays there forever unless you flash with PC ODIN
Finally succeeded

can i flash this on g900f hong kong tgy with instruction u told ?

navinash.avi said:
can i flash this on g900f hong kong tgy with instruction u told ?
Click to expand...
Click to collapse
it can be flashed on any g900F

Worked painlessly.... Your a genius!

Why do we have to flash the bootloader and modem twice? Isn`t flashing the rom with Mobile Odin Pro with a data factory reset and wipe the caches enough? I downgraded from NG2 to NE2 yesterday with Odin and a flash and a data factory reset was enough, also for the modem and bootloader. Unlike custom roms where only the build (system) and kernel are flashed official firmware flash the whole package.

gee2012 said:
Why do we have to flash the bootloader and modem twice? Isn`t flashing the rom with Mobile Odin Pro with a data factory reset and wipe the caches enough? I downgraded from NG2 to NE2 yesterday with Odin and a flash and a data factory reset was enough, also for the modem and bootloader. Unlike custom roms where only the build (system) and kernel are flashed official firmware flash the whole package.
Click to expand...
Click to collapse
I cannot activate usb debugging so if you are right I can skip to flash the bootloader and modem. This is only reason why till now I didn't follow this guide....

@aquarello
Very big thanks to you. Works fine for me. Now I have a rooted NG2 with KNOX 0x0. [emoji106]

wajiman said:
hmm, strange, for me it first booted into download mode and i dont think it flashed the firmware at all. now it keeps on booting into download mode
EDIT:
@aguarello i repeated these steps 3 times already, i think there is a step which is missing because it keeps on booting into download mode no matter what i do.j
Found the issue:
i think its a bug in mobile odin. if you have selected "Wipe Dalvik Cache." the phone straight away boots into download mode without flashing the firmware and stays there forever unless you flash with PC ODIN
Finally succeeded
Click to expand...
Click to collapse
Glad that you solve your issue.
navinash.avi said:
can i flash this on g900f hong kong tgy with instruction u told ?
Click to expand...
Click to collapse
Yes, as long is a G900F, you can flash this.
gee2012 said:
Why do we have to flash the bootloader and modem twice? Isn`t flashing the rom with Mobile Odin Pro with a data factory reset and wipe the caches enough? I downgraded from NG2 to NE2 yesterday with Odin and a flash and a data factory reset was enough, also for the modem and bootloader. Unlike custom roms where only the build (system) and kernel are flashed official firmware flash the whole package.
Click to expand...
Click to collapse
When in KitKat, and you don't flash this files seperately, the phone gets stuck in a bootloop (there's even a warning of this when you first open Odin Mobile), I've tried several times to do it without flashing seperately but as I told you, the phone gets stuck.
Flashing this files on the PC is not a big deal though, only 5 minutes and the files are very small...
*elmo* said:
I cannot activate usb debugging so if you are right I can skip to flash the bootloader and modem. This is only reason why till now I didn't follow this guide....
Click to expand...
Click to collapse
Why can't you activate USB debugging? As I said, the phone will MOST PROBABLY stuck in a bootloop.

is any one tried this method
did worked ?
please any one make an video tutorials for fresher learners

edwardob said:
Worked painlessly.... Your a genius!
Click to expand...
Click to collapse
did you have such problems as wajiman:
i think its a bug in mobile odin. if you have selected "Wipe Dalvik Cache." the phone straight away boots into download mode without flashing the firmware and stays there forever unless you flash with PC ODIN

navinash.avi said:
is any one tried this method
did worked ?
please any one make an video tutorials for fresher learners
Click to expand...
Click to collapse
There are comments confirming that this DOES WORKS.(plus I did this the first time with MY device and had no issues)
I don't have the experience nor the time to do a video tutorial, if anyone wants to, they're free to do it. (Instructions are pretty clear though)

aguarello said:
There are comments confirming that this DOES WORKS.(plus I did this the first time with MY device and had no issues)
I don't have the experience nor the time to do a video tutorial, if anyone wants to, they're free to do it. (Instructions are pretty clear though)
Click to expand...
Click to collapse
good work
but im worrying is im on g900f hk tgy
latest was g900f uk
as i readed in xda there is an error of repaertions while flashing

can i use firmware for my country/operater ( http://www.sammobile.com/firmwares/3/?download=33111 )?
and with that firmware i still use yours Bootloader and Modem files from dropbox? (yes, because bootloader and modem are the same for all countries?)

navinash.avi said:
good work
but im worrying is im on g900f hk tgy
latest was g900f uk
as i readed in xda there is an error of repaertions while flashing
Click to expand...
Click to collapse
As I said, this works on every G900F device, and I haven't heard of that error... But is your decision man
Und3rtaker said:
can i use firmware for my country/operater ( http://www.sammobile.com/firmwares/3/?download=33111 )?
and with that firmware i still use yours Bootloader and Modem files from dropbox? (yes, because bootloader and modem are the same for all countries?)
Click to expand...
Click to collapse
Yes in theory you can.

aguarello said:
Yes in theory you can.
Click to expand...
Click to collapse
why in theory? is there something special about your firmware or link to bootloader or modem?

yes yes yes
Und3rtaker said:
why in theory? is there something special about your firmware or link to bootloader or modem?
Click to expand...
Click to collapse
Just saying I've only try this with that firmware, but YES, you CAN use one from another country as long is the same build (G900FXXU1ANG2)

aguarello said:
Just saying I've only try this with that firmware, but YES, you CAN use one from another country as long is the same build (G900FXXU1ANG2)
Click to expand...
Click to collapse
much better answer for me THANK YOU

[Q] Is my GT-I8190L unflashable?

Hi good day,
I have a Samsung S3 Mini Latin version and i was wondering if it can't be flashed because i tried multiple flash files. I used Odin, Z3X and FuriousGold and it didn't flash. It said successful but when the phone rebooted it came back to the same data it had. Nothing changed at all. Can someone help me on this.
Thanks! :good:

Vision Electronics said:
Hi good day,
I have a Samsung S3 Mini Latin version and i was wondering if it can't be flashed because i tried multiple flash files. I used Odin, Z3X and FuriousGold and it didn't flash. It said successful but when the phone rebooted it came back to the same data it had. Nothing changed at all. Can someone help me on this.
Thanks! :good:
Click to expand...
Click to collapse
what files you flash?

I flashed the Pit, Bootloader, PDA, Modem and CSC and still nothing it just returns to the previous data the phone had.

Vision Electronics said:
I flashed the Pit, Bootloader, PDA, Modem and CSC and still nothing it just returns to the previous data the phone had.
Click to expand...
Click to collapse
you use the odin v3.09?

KwstPap said:
you use the odin v3.09?
Click to expand...
Click to collapse
I used Odin v1.83, v3.07, v3.09 & v3.10.0. Still got the same result i don't know if the phone needs to be wiped completely but i'm afraid the phone will die on me.

With Odin, all I can flash is a stock rom and a rooted stock rom. Any stock rom with recovery in it would fail. Once I got a root stock rom on it, I used a terminal app to write TWRP to the recovery block. From there I could flash other roms. Back everything up that is unique to our phone like IMEI as soon as you can just in case. Make sure you have copies elsewhere like your pc. You might wipe your internal, external sdcard or both by accident. I'm stuck with f2fs on my system drive, no way to reformat and no way to flash a rom that can use f2fs.
So the recovery block is locked and I think bootloader and possibly another area as well. Blocked as far as Odin, but not from the phone once it is running.

please help, soft brick fix. only download mode is accessible

i am stuck in a bootloop, i cant even get to recovery. its been like this for weeks, i odin flashed stock firmware like 50 times. i have the stock firmware from sammobile, if you can help that will be great, i pretty sure i tired everything i know of. help would be nice.

re: bootloops
proman505 said:
i am stuck in a bootloop, i cant even get to recovery. its been like this for weeks, i odin flashed stock firmware like 50 times. i have the stock firmware from sammobile, all i need (i hope) is the bootloader and baseband. if you can help that will be great, i pretty sure i tired everything i know of so help would be nice.
Click to expand...
Click to collapse
Which version of the firmware did you odin flash? I have download links for
the baseband and bootloader but I do not want to post the wrong versions.
I am certain of one thing though, your problem is not related at all to the baseband or the bootloader.
If you have successfully odin flashed the proper version of the N910T firmware then you already have
the bootloader and baseband in your phone.
What you really need to do is to go into download mode and odin flash the proper version of twrp.
Then pull the battery and replace it, once it's replaced hold down the volume-up, home key and
the power button at the same time until you feel the phone vibrate, then let go of all the buttons
and the phone will go into twrp recovery.
Once you get there do a full wipe:
System,data, cache and dalvik cache and last but not least do a factory reset.
Once that's done let twrp reboot your phone and you should be good to go except
you will need to odin flash cf-autoroot if you want root access.
Good luck,
Have a great day!

Misterjunky said:
Which version of the firmware did you odin flash? I have download links for
the baseband and bootloader but I do not want to post the wrong versions.
I am certain of one thing though, your problem is not related at all to the baseband or the bootloader.
If you have successfully odin flashed the proper version of the N910T firmware then you already have
the bootloader and baseband in your phone.
What you really need to do is to go into download mode and odin flash the proper version of twrp.
Then pull the battery and replace it, once it's replaced hold down the volume-up, home key and
the power button at the same time until you feel the phone vibrate, then let go of all the buttons
and the phone will go into twrp recovery.
Once you get there do a full wipe:
System,data, cache and dalvik cache and last but not least do a factory reset.
Once that's done let twrp reboot your phone and you should be good to go except
you will need to odin flash cf-autoroot if you want root access.
Good luck,
Have a great day!
Click to expand...
Click to collapse
N910TUVU1ANK4_N910TTMB1ANK4_N910TUVU1ANK4_HOME.tar
That's the one i am flashing via odin. i opened kies restored everything i put my model # and serial # it installed the latest version of the stock firmware, i still have the same problem. my model # (on the back of the phone) SM-N910T

Okay, you don't need the bootloader or the base band.
Follow the instructions I posted for you.
Good luck!
Sent from my SM-G928T using Tapatalk

Misterjunky said:
Okay, you don't need the bootloa der or the base band.
Follow the instructions I posted for you.
Good luck!
Sent from my SM-G928T using Tapatalk
Click to expand...
Click to collapse
i did, same problem. it seems like im the only one having this problem, nothing is helping.

proman505 said:
i did, same problem. it seems like im the only one having this problem, nothing is helping.
Click to expand...
Click to collapse
Okay, then odin flash the "N910TUVU1ANK4_N910TTMB1ANK4_N910TUVU1ANK4_HOME.tar"
again, reboot the phone into download mode but before you do, remove and replace the battery.
Once in download mode go ahead and odin flash the "N910TUVU1ANK4_N910TTMB1ANK4_N910TUVU1ANK4_HOME.tar".
Then go back into download mode and odin flash the twrp recovery. (first remove and replace the battery)
Be SURE you use the proper version of twrp before you odin
flash it, the proper version for N910T is "twrp trtetmo 2.8.7.0" ...
If the above don't work for you then you must not be following
the instructions 100% to a "T" ...
Good luck!

Misterjunky said:
Okay, then odin flash the "N910TUVU1ANK4_N910TTMB1ANK4_N910TUVU1ANK4_HOME.tar"
again, reboot the phone into download mode but before you do, remove and replace the battery.
Once in download mode go ahead and odin flash the "N910TUVU1ANK4_N910TTMB1ANK4_N910TUVU1ANK4_HOME.tar".
Then go back into download mode and odin flash the twrp recovery. (first remove and replace the battery)
Be SURE you use the proper version of twrp before you odin
flash it, the proper version for N910T is "twrp trtetmo 2.8.7.0" ...
Good luck!
Click to expand...
Click to collapse
i'll try that. thanks in advance

Misterjunky said:
Okay, then odin flash the "N910TUVU1ANK4_N910TTMB1ANK4_N910TUVU1ANK4_HOME.tar"
again, reboot the phone into download mode but before you do, remove and replace the battery.
Once in download mode go ahead and odin flash the "N910TUVU1ANK4_N910TTMB1ANK4_N910TUVU1ANK4_HOME.tar".
Then go back into download mode and odin flash the twrp recovery. (first remove and replace the battery)
Be SURE you use the proper version of twrp before you odin
flash it, the proper version for N910T is "twrp trtetmo 2.8.7.0" ...
If the above don't work for you then you must not be following
the instructions 100% to a "T" ...
Good luck!
Click to expand...
Click to collapse
i did exactly what it says, same problem. odin says pass on every flash. im about to go throw this phone in the trash this is really pissing me off

Just call tmobile tell them that the phone died and get a replacement. OK, why don't you try installing an older firmware?

justice26 said:
Just call tmobile tell them that the phone died and get a replacement. OK, why don't you try installing an older firmware?
Click to expand...
Click to collapse
i did they said i voided the warranty. i guess this note 4 is gonna be my new coaster

Quick question, what firmware version were you at before this started and have you tried installing an older or newer version like LP for example?. Also verify you are downloading the correct version for your model.

help please!

Hi everyone i desperately need some help, i had a rooted note 4 gave it to my cousin in greece, he just came back and i told him i would update it, i downloaded tekx"s rom and installed i did a full wipe as usual, after it installed the phone kept on rebooting over and over again, so i thought maybe i had to update the firmware, i tried doing that but i keep getting a fail message i cant update anything. so i rerooted the phone tried updating the firmware again and still getting a fail message. so now i dont have anything on the phone i am only able to go into recovery or down load mode, cant go into any type of settings on the phone incase i forgot to unlock something in there. i've looked everywhere on the net and cant find any type of solution, can someone help me out please? Thank you

panitsos said:
Hi everyone i desperately need some help, i had a rooted note 4 gave it to my cousin in greece, he just came back and i told him i would update it, i downloaded tekx"s rom and installed i did a full wipe as usual, after it installed the phone kept on rebooting over and over again, so i thought maybe i had to update the firmware, i tried doing that but i keep getting a fail message i cant update anything. so i rerooted the phone tried updating the firmware again and still getting a fail message. so now i dont have anything on the phone i am only able to go into recovery or down load mode, cant go into any type of settings on the phone incase i forgot to unlock something in there. i've looked everywhere on the net and cant find any type of solution, can someone help me out please? Thank you
Click to expand...
Click to collapse
Flash latest stock firmware in odin .
Once odin shows PASS go to stock recovery and do factory reset and wait 15 minutes to boot.
Do you have N910T tmobile note 4 ?
Link below for n910t latest firmware.
Extract the file and flash using odin choose AP
https://www.androidfilehost.com/?fid=385035244224408290

Trex888 said:
Flash latest stock firmware in odin .
Once odin shows PASS go to stock recovery and do factory reset and wait 15 minutes to boot.
Do you have N910T tmobile note 4 ?
Link below for n910t latest firmware.
Extract the file and flash using odin choose AP
https://www.androidfilehost.com/?fid=385035244224408290
Click to expand...
Click to collapse
i tried the cog2 the dok firmware nothing it fails all the time. if i try flashing this newer firmware and it works by some chance then i'm worried i wont be able to get a rom to work because from what i've seen most roms are cog2 or doc 6

panitsos said:
i tried the cog2 the dok firmware nothing it fails all the time. if i try flashing this newer firmware and it works by some chance then i'm worried i wont be able to get a rom to work because from what i've seen most roms are cog2 or doc 6
Click to expand...
Click to collapse
yes i have a tmboile note 4

Question Stuck in Download mode after firmware flash

Hi, I need some help flashing my device. Somehow, my device got stuck in a boot loop last night, and I've been having trouble getting it to work again. I think my phone may have reset during an update while in my pocket as I was laying down on the couch last night.
I found my device firmware on sammobile according to the specs listed below. I've downloaded Odin 3.14.4 and have flashed my phone successfully 3 or 4 times at this point, but when it restarts post-flash, it keeps booting into download mode. I can't seem to get it to boot into recovery mode or just turn it off at all anymore. No matter what, it boots straight into download mode.
Does anyone know of a way that I can force it into recovery mode so that I can try restarting it normally? This is my first time flashing a phone, so I have little experience here though I am competent with technology and willing to try further tricks to get it working.
I'm just looking for recommendations and hoping that my phone isn't bricked. I've only owned it for 3 months at this point, so I'm very disappointed.
Thanks in advance for the help, and I'm happy to provide any more information if it helps you come up with any potential solutions.
Specs
Phone: Samsung 21 Ultra
Model: SM-G998U1
PDA: G998U1UES5CVCB
Carrier: XAA
Text on download mode screen:
<!>
partition recovery
Reason avb.slot_verify.c:276: ERROR: recovery: Hash of data does not match digest in descriptor. [2nd]
Calculated Hash of (recovery) : 9C3B9F195F, (VEMETA) : 1C38BF9F7A
Samsung recovery, G998U1UES5CVCB, 50338466R
VBMETA G998U1UES5CVCB, 50341365R

Do you have TWRP installed? Try flushing it. You can also follow Dr. Ketan ROM installation guide, it's very straightforward.

shaharofir said:
Do you have TWRP installed? Try flushing it. You can also follow Dr. Ketan ROM installation guide, it's very straightforward.
Click to expand...
Click to collapse
I don't. I was looking at that post earlier and noticed that it mentioned the G998B/N model. Mine is the G998U1, so I was worried that it wouldn't work or cause more problems. I couldn't find any versions of TWRP that matched my specific model.

your bootloader version is above v1. cannot be unlocked. you need to flash a samsung rom. try redownloading it if you can't boot. and twrp probably won't work either.
you're saying that if you hold the vol up key and power button when the device is off that it won't reboot into recovery at all?

ffuser1 said:
your bootloader version is above v1. cannot be unlocked. you need to flash a samsung rom. try redownloading it if you can't boot. and twrp probably won't work either.
you're saying that if you hold the vol up key and power button when the device is off that it won't reboot into recovery at all?
Click to expand...
Click to collapse
I was actually able to get it to boot into recovery mode this morning. The download mode timed out and the phone shut off which allowed me to finally get into it. I tried redownloading the same rom I got from sammbolie again a few mins ago but still no luck.

Try another firmware with the same BL revision, CVC9 for example

dipotis said:
Hi, I need some help flashing my device. Somehow, my device got stuck in a boot loop last night, and I've been having trouble getting it to work again. I think my phone may have reset during an update while in my pocket as I was laying down on the couch last night.
I found my device firmware on sammobile according to the specs listed below. I've downloaded Odin 3.14.4 and have flashed my phone successfully 3 or 4 times at this point, but when it restarts post-flash, it keeps booting into download mode. I can't seem to get it to boot into recovery mode or just turn it off at all anymore. No matter what, it boots straight into download mode.
Does anyone know of a way that I can force it into recovery mode so that I can try restarting it normally? This is my first time flashing a phone, so I have little experience here though I am competent with technology and willing to try further tricks to get it working.
I'm just looking for recommendations and hoping that my phone isn't bricked. I've only owned it for 3 months at this point, so I'm very disappointed.
Thanks in advance for the help, and I'm happy to provide any more information if it helps you come up with any potential solutions.
Specs
Phone: Samsung 21 Ultra
Model: SM-G998U1
PDA: G998U1UES5CVCB
Carrier: XAA
Text on download mode screen:
<!>
partition recovery
Reason avb.slot_verify.c:276: ERROR: recovery: Hash of data does not match digest in descriptor. [2nd]
Calculated Hash of (recovery) : 9C3B9F195F, (VEMETA) : 1C38BF9F7A
Samsung recovery, G998U1UES5CVCB, 50338466R
VBMETA G998U1UES5CVCB, 50341365R
Click to expand...
Click to collapse
Was your phone carrier branded originally? And you're flashing the u1 firmware so you won't have bloat? Or is it originally an unlocked model? I ask because if it was originally carrier branded and you used the Odin version from the SamMobile site then that may be the reason. U need to use the modded version of Odin that's floating around somewhere. If you need it I can upload it to my drive and let you download that version. I literally just flashed VCB last night and everything worked just fine.

JG96EVO said:
Was your phone carrier branded originally? And you're flashing the u1 firmware so you won't have bloat? Or is it originally an unlocked model? I ask because if it was originally carrier branded and you used the Odin version from the SamMobile site then that may be the reason. U need to use the modded version of Odin that's floating around somewhere. If you need it I can upload it to my drive and let you download that version. I literally just flashed VCB last night and everything worked just fine.
Click to expand...
Click to collapse
No, I bought my phone directly from Samsung, and I bought the unlocked model. I chose the rom from sammobile that looked to be exactly what my phone originally had on it based on the model and PDA/carrier info I found when looking through the recovery logs on the phone when the issue first occurred, before flashing anything onto it. If you think the modded Odin might work, I'd be willing to give it a shot.

I can't tell you the exact differences, but I would flash with the patched odin. it's on xda if you search for it.

No luck so far. I've downloaded the patched Odin software and have tried flashing my device numerous times with the same result. I also tried tried flashing firmware that I found on Frija instead of the firmware I originall downloaded from sammobile to see if anything would be different, and that didn't seem to make a difference.
My best guess (could be wrong) is that it doesn't like the bootloader tied to the firmware I've tried to flash onto the device. I've spent a good while searching firmware that uses the version of the bootloader it wants, but I can't find it anywhere. At this point, I'm all out of ideas, but I appreciate everyone's responses and advice.

So this is what you are saying: You're using patched odin (https://forum.xda-developers.com/attachments/odin3-v3-14-1_3b_patched-zip.5158507/) to flash an official U1 Samsung rom (https://samfw.com/firmware/SM-G998U1/XAA/G998U1UES5CVCB for example) in the AP slot, all other slots are empty, without any odin errors during flash, and are then unable to boot, with partition errors seen in download mode? This is very unusual... flashing in download mode overwrites partitions, including recovery. I would assume if there are no odin errors, then the rom file is not corrupt and the sd card is not damaged. I don't know much about flashing through odin with a locked bootloader, maybe unpatched odin with the above instructions is worth a shot. I'm out of ideas aside from the sd card being damaged or trying unpatched odin if the above instructions with patched odin are resulting in recovery partition errors. I don't think you can access adb in download mode either.

You can extract the CSC file using 7zip. In there you will find the PIT file and you can try flashing it with repartition selected and inserting the PIT file in developers section of Odin.

ffuser1 said:
So this is what you are saying: You're using patched odin (https://forum.xda-developers.com/attachments/odin3-v3-14-1_3b_patched-zip.5158507/) to flash an official U1 Samsung rom (https://samfw.com/firmware/SM-G998U1/XAA/G998U1UES5CVCB for example) in the AP slot, all other slots are empty, without any odin errors during flash, and are then unable to boot, with partition errors seen in download mode? This is very unusual... flashing in download mode overwrites partitions, including recovery. I would assume if there are no odin errors, then the rom file is not corrupt and the sd card is not damaged. I don't know much about flashing through odin with a locked bootloader, maybe unpatched odin with the above instructions is worth a shot. I'm out of ideas aside from the sd card being damaged or trying unpatched odin if the above instructions with patched odin are resulting in recovery partition errors. I don't think you can access adb in download mode either.
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Interesting. I did not try it with only the AP slot populated. I thought you needed to always flash with the BL, AP, CP, and CSC.

wait, i messed up. if it has all of those files, flash them. my bad. i was thinking about custom roms - sorry about that.

Hey everyone, just wanted to make a final update.
I ended up bringing my phone into ubreakifix after trying just about everything I could, and they were not able to fix it either. They suggested that it might be a hardware issue and recommended sending it to Samsung for repair. I then sent it over to Samsung, and they confirmed that it was an issue with my motherboard. Samsung replaced my motherboard, and the phone is back in action. Since I only had my phone for about 6 months, it was still under warranty.
I appreciate everyone who took their time to provide me with advice. I hope that this post may help someone experiencing a similar issue to mine in the future.