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Fap locked

Hi
i rooted my g935f and installed a custom recovery, all went wel
then i installed custome firmware , after that by mistake i disabled oem lock,
my s7 won't boot up, w'ont enter in recovery mod and won't accept odin flashes,
i'm I fu"ked ????
:'(

nouninou said:
Hi
i rooted my g935f and installed a custom recovery, all went wel
then i installed custome firmware , after that by mistake i disabled oem lock,
my s7 won't boot up, w'ont enter in recovery mod and won't accept odin flashes,
i'm I fu"ked ????
:'(
Click to expand...
Click to collapse
You don't give a whole lot of information as to the processes you tried or "custom firmware " you installed or can you get to download mode.
More information is needed
"And on that bombshell!"
Sent from my Echoe powered AEL driven G935F

i can get into download mode but i can't flash rom via it

Going to try help you here best as I can.
I ran into the issue. And basically it's a lock that prevents you from doing anything due to your phone running a custom rom. I don't know what triggers it but it is a security feature to prevent someone flashing a custom rom to get easier access to your data (Think back to the whole FBI vs Apple saga)
What you have to do is flash a completely stock ROM with Odin. Phone wouldn't allow a ROM other than a Samsung signed ROM. What I did was download the Stock ROM from here: http://forum.xda-developers.com/s7-edge/how-to/official-stock-firmware-update-odin-t3335065
Now I flashed all the different parts of the ROM with Odin and your phone in download mode. They should flash as this is a Stock ROM.
Sadly I don't know enough to know which ones you have to do as I just did them all and allowed me to use my phone again but did lose any data that was on the device.
I do not know enough about this stuff and what I have said is from my experience with the exact issue are describing on my S7 Edge. Really hope it helps.

tanka8 said:
Going to try help you here best as I can.
I ran into the issue. And basically it's a lock that prevents you from doing anything due to your phone running a custom rom. I don't know what triggers it but it is a security feature to prevent someone flashing a custom rom to get easier access to your data (Think back to the whole FBI vs Apple saga)
What you have to do is flash a completely stock ROM with Odin. Phone wouldn't allow a ROM other than a Samsung signed ROM. What I did was download the Stock ROM from here: http://forum.xda-developers.com/s7-edge/how-to/official-stock-firmware-update-odin-t3335065
Now I flashed all the different parts of the ROM with Odin and your phone in download mode. They should flash as this is a Stock ROM.
Sadly I don't know enough to know which ones you have to do as I just did them all and allowed me to use my phone again but did lose any data that was on the device.
I do not know enough about this stuff and what I have said is from my experience with the exact issue are describing on my S7 Edge. Really hope it helps.
Click to expand...
Click to collapse
thank you mate, it actually worked for me, now i can start my phone, sadly all the data was deleted
thanks for your answer

nouninou said:
Hi
i rooted my g935f and installed a custom recovery, all went wel
then i installed custome firmware , after that by mistake i disabled oem lock,
my s7 won't boot up, w'ont enter in recovery mod and won't accept odin flashes,
i'm I fu"ked ????
:'(
Click to expand...
Click to collapse
bro just flash the original firmware and not twrp as it requires oem unlocking and if it still doesn't work then try to use an older version of odin or a newer version of it and check if ur files are up to date and not corrupt

Unable to select OEM Unlock from menu

Hi everyone,
I've purchased a G935S while in Korea, and now that I'm home, it's time to start playing! Unfortunately, I'm stuck at square one - I'm not able to select OEM Unlock from the developer menu, as it's greyed out.
Any ideas?
Fingers crossed and I hope to hear some good news soon!
-Greg

Install crom.apk it will unlock it but i dont know much which twrp will work
Sent from my SM-N930F using Tapatalk

No Go
rauff lala said:
Install crom.apk it will unlock it but i dont know much which twrp will work
Sent from my SM-N930F using Tapatalk
Click to expand...
Click to collapse
No luck. 1.0.4 would install but wouldn't run. Any other thoughts?

http://forum.xda-developers.com/s7-edge/how-to/guide-sm-g9350-s7-edge-qualcomm-sd820-t3410969
Sent from my SM-N930F using Tapatalk
---------- Post added at 11:48 PM ---------- Previous post was at 11:47 PM ----------
Check this if this helps
Sent from my SM-N930F using Tapatalk

Check SKT carrier specific features in Settings, I've heard one of them blocks OEM unlock. Maybe something related to device loss I guess..

Still no luck.. I tried to follow the tutorial - crom won't run (and the tutorial is actually for the Hong Kong model - not the Korean).
So frustrating!
Has anyone rooted a 935S?

have you solved this problem ?

zenki1 said:
have you solved this problem ?
Click to expand...
Click to collapse
No... I've exhausted every option I could find, and no luck.

merlin3d said:
No... I've exhausted every option I could find, and no luck.
Click to expand...
Click to collapse
Whats about a custom Rom? Flash it via Odin and you will have no need for unlock OEM!
Try out King Nougat-Rom, its very good for me working (without unlock OEM!)

Any Solution Please...
I have got a S7 edge(sm-g935s) as you guys and also my phone doesn't let me to turn on oem unlock feature.I have tried so many things now i'm so tired.
*I flashed combination file for this modle.
*I downgraded it to marshmallows.
Nothing works.Is there anyone have a solution please let me know.Thank you very much.:crying:

have you tried downloading rom with different csc for same model and flashing it with odin

roy331 said:
have you tried downloading rom with different csc for same model and flashing it with odin
Click to expand...
Click to collapse
Sm-g935s has only one csc.Because this phone is only sale in korea not the international version.

merlin3d said:
Still no luck.. I tried to follow the tutorial - crom won't run (and the tutorial is actually for the Hong Kong model - not the Korean).
So frustrating!
Has anyone rooted a 935S?
Click to expand...
Click to collapse
I have a 935S was also on SKT, but was factory unlocked. Sounds like it may be carrier locked, but you could always try to flash TWRP and see what happens. But don't necessarily listen to me, I don't remember if trying to flash TWRP on a locked device just fails or wrecks ****, it's been a while since I used a locked device

BurnedDrake said:
I have a 935S was also on SKT, but was factory unlocked. Sounds like it may be carrier locked, but you could always try to flash TWRP and see what happens. But don't necessarily listen to me, I don't remember if trying to flash TWRP on a locked device just fails or wrecks ****, it's been a while since I used a locked device
Click to expand...
Click to collapse
I have also 935s device but OTA update without turn on OEM unlock feature is the cause to this problem.I bought my phone from another one but he had already updated his phone to oreo without turn on OEM unlock in developer option.After updating OEM Unlock toggle grayed out.This cannot be fixed with simply flash twrp.It only displays "custom recovery is blocked by frp".It's automatically turn on frp lock when you restart your phone after flashing twrp or rom because of still our phone's bootloder is locked.
I don't know how to fix this.I am so frustrating with this matter.If anyone found a way to turn on oem unlock in developer option it is possible to unlock bootloder.

Densil said:
I have also 935s device but OTA update without turn on OEM unlock feature is the cause to this problem.I bought my phone from another one but he had already updated his phone to oreo without turn on OEM unlock in developer option.After updating OEM Unlock toggle grayed out.This cannot be fixed with simply flash twrp.It only displays "custom recovery is blocked by frp".It's automatically turn on frp lock when you restart your phone after flashing twrp or rom because of still our phone's bootloder is locked.
I don't know how to fix this.I am so frustrating with this matter.If anyone found a way to turn on oem unlock in developer option it is possible to unlock bootloder.
Click to expand...
Click to collapse
FRP and a locked bootloader are two different things. To get rid of FRP just remove your Google account from the phone.
Sent from my SM-G935S using Tapatalk

BurnedDrake said:
FRP and a locked bootloader are two different things. To get rid of FRP just remove your Google account from the phone.
Sent from my SM-G935S using Tapatalk
Click to expand...
Click to collapse
I know how to get rid of FRP:laugh: but i said that it is turn on when restart after flashing custom recovery because of locked bootloder.There is no way to get rid of it.
Only way to solve this problem is to turn on oem unlock in developer option.

Densil said:
I have also 935s device but OTA update without turn on OEM unlock feature is the cause to this problem.I bought my phone from another one but he had already updated his phone to oreo without turn on OEM unlock in developer option.After updating OEM Unlock toggle grayed out.This cannot be fixed with simply flash twrp.It only displays "custom recovery is blocked by frp".It's automatically turn on frp lock when you restart your phone after flashing twrp or rom because of still our phone's bootloder is locked.
I don't know how to fix this.I am so frustrating with this matter.If anyone found a way to turn on oem unlock in developer option it is possible to unlock bootloder.
Click to expand...
Click to collapse
Have your tried oem unlock in fastboot mode? If that's no go then your only other recourse would be to contact either SKT or Samsung to get the bootloader unlock code

BurnedDrake said:
Have your tried oem unlock in fastboot mode? If that's no go then your only other recourse would be to contact either SKT or Samsung to get the bootloader unlock code
Click to expand...
Click to collapse
Yes, I have tried fastboot adb command to unlock bootloder but it fails because it cannot be done without turn on OEM Unlock in developer option.
I don't think samsung or skt could help with this case.I think they locked our bootloder with OTA Update.They won't help us except only we found a way to unlock our bootloders.

Densil said:
Yes, I have tried fastboot adb command to unlock bootloder but it fails because it cannot be done without turn on OEM Unlock in developer option.
I don't think samsung or skt could help with this case.I think they locked our bootloder with OTA Update.They won't help us except only we found a way to unlock our bootloders.
Click to expand...
Click to collapse
With a locked bootloader either Samsung or SKT would be able to give you the bootloader unlock code. That's how it works when you get a phone with a locked bootloader. Unless they do like Hauwai and ban it completely, which they have not.

merlin3d said:
Hi everyone,
I've purchased a G935S while in Korea, and now that I'm home, it's time to start playing! Unfortunately, I'm stuck at square one - I'm not able to select OEM Unlock from the developer menu, as it's greyed out.
Any ideas?
Fingers crossed and I hope to hear some good news soon!
-Greg
Click to expand...
Click to collapse
Are you able to turn on OEM unlock at now?

Forgot to activate OEM-Unlock for Root. Phone Bricked: "Custom binary blocked by FRP"

Forgot to activate OEM-Unlock for Root. Phone Bricked: "Custom binary blocked by FRP"
Hello,
today i rooted my J5 (SM-J500FN) via Odin and CF-Auto-Root.
Everyting went well but after the root i unticked OEM-Lock (please dont ask me why i did it) and restarted my phone and this nice screen greeted me: "Custom binary blocked by FRP. SECURE FAIL: KERNEL"
So I tried everything I found on the Web and found nothing really helpful. Then i tried flashing the recovery and reflashing CF-Auto-Root but both got blocked in the Download Mode with the message "FRP Block".
Please can someone help me, i really hope i dont have to reset my phone because my google authenticator is stored on it, and it would be a real pain to write to the support of every account i connected to reset my Security Options.
Thanks, Toby
P.S: when i flash the boot.img does it wipe my device?

Toby9 said:
Hello,
today i rooted my J5 (SM-J500FN) via Odin and CF-Auto-Root.
Everyting went well but after the root i unticked OEM-Lock (please dont ask me why i did it) and restarted my phone and this nice screen greeted me: "Custom binary blocked by FRP. SECURE FAIL: KERNEL"
So I tried everything I found on the Web and found a few things like flashing the recovery. I tried reflashing CF-Auto-Root but both got blocked in the Download Mode with the message "FRP Block".
Please can someone help me, i really hope i dont have to reset my phone because my google authenticator is stored on it, and it would be a real pain to write to the support of every account i connected to reset my Security Options.
Thanks, Toby
P.S: when i flash the boot.img does it wipe my device?
Click to expand...
Click to collapse
Just flash the stock firmware.

ashyx said:
Just flash the stock firmware.
Click to expand...
Click to collapse
Doesn't it reset my phone?
I saw a video about it but after he started the phone the device setup greeted him...

Toby9 said:
Doesn't it reset my phone?
I saw a video about it but after he started the phone the device setup greeted him...
Click to expand...
Click to collapse
It will reset it...
Try using Smart Switch from Samsung to backup you stuff and accounts. Maybe it will work. Using Smart Switch you can also easily reflash the latest Marshmallow firmware.

Amarius1 said:
It will reset it...
Try using Smart Switch from Samsung to backup you stuff and accounts. Maybe it will work. Using Smart Switch you can also easily reflash the latest Marshmallow firmware.
Click to expand...
Click to collapse
And if i only flash the boot.img which is inside the firmware archive? would that be "save" to try?

Toby9 said:
And if i only flash the boot.img which is inside the firmware archive? would that be "save" to try?
Click to expand...
Click to collapse
I don't know about that... Try asking someine more experienced.
I do know that even in Recovery mode the ROM locks you out and doesn't let you factory reset for example

Amarius1 said:
I don't know about that... Try asking someine more experienced.
I do know that even in Recovery mode the ROM locks you out and doesn't let you factory reset for example
Click to expand...
Click to collapse
Ok thank you I just went for the boot.img flash and it worked! puh im relieved
Now you know that it does not reset.
I will write a guide to finally get rid of this stupid FRP error once and for all!

Toby9 said:
Ok thank you I just went for the boot.img flash and it worked! puh im relieved
Now you know that it does not reset.
I will write a guide to finally get rid of this stupid FRP error once and for all!
Click to expand...
Click to collapse
Congrats! Had the sane problem last summer and I had to completely reset it...
(Btw why thank you? I didn"t do anything ???)

Toby9 said:
Ok thank you I just went for the boot.img flash and it worked! puh im relieved
Now you know that it does not reset.
I will write a guide to finally get rid of this stupid FRP error once and for all!
Click to expand...
Click to collapse
I did a guide in past: https://forum.xda-developers.com/showpost.php?p=68408932&postcount=65 . I'll add it to the new Q&A thread after I'll update that thread (when I'll have time).
Feel free to do a new guide.

Toby9 said:
Doesn't it reset my phone?
I saw a video about it but after he started the phone the device setup greeted him...
Click to expand...
Click to collapse
No it does not. You are not affecting the data partition.
This would only happen if you flashed the factory repair firmware.

Thank you all. Here is my Guide: https://forum.xda-developers.com/android/general/complete-guide-to-rid-custom-binary-t3541403
It is generally for all (Samsung) Smarphones as i believe that it wont be any different.
Amarius1 said:
Congrats! Had the sane problem last summer and I had to completely reset it...
(Btw why thank you? I didn"t do anything )
Click to expand...
Click to collapse
Im just glad it worked

Toby9 said:
Thank you all. Here is my Guide: https://forum.xda-developers.com/android/general/complete-guide-to-rid-custom-binary-t3541403
It is generally for all (Samsung) Smarphones as i believe that it wont be any different.
Im just glad it worked
Click to expand...
Click to collapse
Happy for you ^^

When activating the oem unlock you can install Twrp, kernel or custom rom without the activation of FRP security that is activated when you establish a security pattern in the device
When the binary is blocked by the FRP you must install the factory firmware, then enter the recovery and do a factory reset since the FRP prevents external access to the system and data as prevention
You will be prompted for the email and password of the previously used account

Demicro said:
When activating the oem unlock you can install Twrp, kernel or custom rom without the activation of FRP security that is activated when you establish a security pattern in the device
When the binary is blocked by the FRP you must install the factory firmware, then enter the recovery and do a factory reset since the FRP prevents external access to the system and data as prevention
You will be prompted for the email and password of the previously used account
Click to expand...
Click to collapse
You only need to enter your login details if you factory reset.
Flashing the stock firmware is enough to remove frp. No need to factory reset.

ashyx said:
You only need to enter your login details if you factory reset.
Flashing the stock firmware is enough to remove frp. No need to factory reset.
Click to expand...
Click to collapse
This problem I had several months ago, I did not remember well. You are right ?

custom binary blockby frp lock on samsung j510gn
ashyx said:
Just flash the stock firmware.
Click to expand...
Click to collapse
hi. i really need help with this. tried several times flashing stockrom using different versions of odin and trying out several firmwares. always result: FAIL. Its a company phone. I honestly didn't do anything with it. Went to bed, next day woke up with the phone off. when I turned it on, bam! custom binary message.

MoximuZ said:
hi. i really need help with this. tried several times flashing stockrom using different versions of odin and trying out several firmwares. always result: FAIL. Its a company phone. I honestly didn't do anything with it. Went to bed, next day woke up with the phone off. when I turned it on, bam! custom binary message.
Click to expand...
Click to collapse
Can you send the logs u get from odin? Also make sure u got the correct model of stock rom for ur device.

I also have frp lock om my phone. It will not boot past maim boot screen. I cannot install twrp due to cuatom binary blocked error. Adb doesnt recognkze my phone either. Odin does, i installed the stock firmware and still will not reboot. Any suggestions or thoughts?? I havent tried to turn oem yet via android studio. Currently in the middle of that. Please help

ndiddy88 said:
I also have frp lock om my phone. It will not boot past maim boot screen. I cannot install twrp due to cuatom binary blocked error. Adb doesnt recognkze my phone either. Odin does, i installed the stock firmware and still will not reboot. Any suggestions or thoughts?? I havent tried to turn oem yet via android studio. Currently in the middle of that. Please help
Click to expand...
Click to collapse
Which device? Don't you know your Google login details?

Custom Binary Blocked by FRP Lock on Custom Rom - don't want to lose data

Hi guys! I got Custom Binary Blocked by FRP Lock while doing idk what, probably i've unticked smth in developers options. I wasn't prepared for this so I haven't made any backup via TWRP. After reading there and there found that flashing in Odin AP, BL, CP and Home_CSC woun't delete my data, right? But I have a custom rom installed on my phone, so, after flashing those files, will my S7 return to stock form even if I flash Home_CSC? Is there any way to not lose data (factory reset) + keeping the custom rom, and get rid of FRP Lock?

Smantanasiceapa said:
Hi guys! I got Custom Binary Blocked by FRP Lock while doing idk what, probably i've unticked smth in developers options. I wasn't prepared for this so I haven't made any backup via TWRP. After reading there and there found that flashing in Odin AP, BL, CP and Home_CSC woun't delete my data, right? But I have a custom rom installed on my phone, so, after flashing those files, will my S7 return to stock form even if I flash Home_CSC? Is there any way to not lose data (factory reset) + keeping the custom rom, and get rid of FRP Lock?
Click to expand...
Click to collapse
If you don't even know that turning off oem unlock will result in custom binary block error, how did you even flashed a custom rom at first place ?
Like seriously man, this is a very basic and first step to enable oem unlock before doing anything to your phone and you disabled it ? And you say you unticked 'something' ? If you don't even know what those options meant why you messed them in first place ..
And no, don't even try flashing with HOME csc on a custom rom ! , I don't think they is any back up option for you to save your data now ..
That is why we say to people here on xda : "ALWAYS KNOW WHAT YOU ARE DOING"
Sent from my S7 Edge using XDA Labs

shah22 said:
If you don't even know that turning off oem unlock will result in custom binary block error, how did you even flashed a custom rom at first place ?
Like seriously man, this is a very basic and first step to enable oem unlock before doing anything to your phone and you disabled it ? And you say you unticked 'something' ? If you don't even know what those options meant why you messed them in first place ..
And no, don't even try flashing with HOME csc on a custom rom ! , I don't think they is any back up option for you to save your data now ..
That is why we say to people here on xda : "ALWAYS KNOW WHAT YOU ARE DOING"
Click to expand...
Click to collapse
But there are too many ) and can't keep up with all details even if I note them. I flash things monthly.
Btw where is OEM unlock in Pie?
Thing is, i've read some bullsh*t about securing the twrp, and got me in a point of unticking Developer options, then all went wrong.

Smantanasiceapa said:
But there are too many ) and can't keep up with all details even if I note them. I flash things monthly.
Btw where is OEM unlock in Pie?
Thing is, i've read some bullsh*t about securing the twrp, and got me in a point of unticking Developer options, then all went wrong.
Click to expand...
Click to collapse
You never supposed to untick 'enable oem unlock' , if you do you invite the trouble.
What you wanted or was doing exactly that prompted you to do this ? What's 'securing' twrp exactly ?
OEM unlock is always in developer options in the settings..
And pls keep upto date with the details and flashing stuff if you don't want to get yourself in trouble.. search is your best friend mate.. Good luck
Sent from my S7 Edge using Tapatalk

shah22 said:
You never supposed to untick 'enable oem unlock' , if you do you invite the trouble.
What you wanted or was doing exactly that prompted you to do this ? What's 'securing' twrp exactly ?
OEM unlock is always in developer options in the settings..
And pls keep upto date with the details and flashing stuff if you don't want to get yourself in trouble.. search is your best friend mate.. Good luck
Click to expand...
Click to collapse
Thank you for advice.
I was thinking to get my recovery (and download mode) secured with a pin or pattern, in case of my phone gets stolen or I loose it. Is it even possible?

Smantanasiceapa said:
Thank you for advice.
I was thinking to get my recovery (and download mode) secured with a pin or pattern, in case of my phone gets stolen or I loose it. Is it even possible?
Click to expand...
Click to collapse
Recovery - maybe. Download mode - highly unlikely.
Lol I never even heard about such things being available ..
I think twrp has a password protect feature maybe.. but dunno if any such thing is for download mode ..
Sent from my S7 Edge using Tapatalk

shah22 said:
Recovery - maybe. Download mode - highly unlikely.
Lol I never even heard about such things being available ..
I think twrp has a password protect feature maybe.. but dunno if any such thing is for download mode ..
Click to expand...
Click to collapse
I'm thinking if download mode can't be secured with a pin or pattern, then securing recovery with a code is useless.

ive done the same thing, accidentally turned off eom unlock in developers and now i cant get into the phone, is there anything i can do, i dont want to lose my data.

rupi1312 said:
ive done the same thing, accidentally turned off eom unlock in developers and now i cant get into the phone, is there anything i can do, i dont want to lose my data.
Click to expand...
Click to collapse
Nope no way as adb method to unlock bootloader doesn't works on samsung, and if it did it would still wipe all your data so not worth the hassle..
Reflash stock rom using odin. And begin from start..
Sent from my S7 Edge using XDA Labs

Galaxy S8 bricked - Stuck in boot loop after flashing twrp

Hey there everyone,
I wanted to root my s8 (sm-950f) and when I flashed twrp my phone initially got stuck in Samsung logo. After managing to shut it down I tried to go to recovery mode to wipe everything and perform a factory reset but I can not do it. All that happens is I get to s8 screen and it reads in red on top left of the screen "Only official released binaries are allowed to be flashed" and it keeps resetting itself. I can access download mode but that's it, I can't do anything else. Currently downloading a stock firmware to try and flash it but with the free downloads it's taking its time. Any help appreciated, I really want to unbrick my phone
note: It shows FRP and OEM lock to be off in download mode, i dont even know if i'll even be able to flash a new fw. Do I just have a very expensive brick in my hands now?

nekropok said:
Hey there everyone,
I wanted to root my s8 (sm-950f) and when I flashed twrp my phone initially got stuck in Samsung logo. After managing to shut it down I tried to go to recovery mode to wipe everything and perform a factory reset but I can not do it. All that happens is I get to s8 screen and it reads in red on top left of the screen "Only official released binaries are allowed to be flashed" and it keeps resetting itself. I can access download mode but that's it, I can't do anything else. Currently downloading a stock firmware to try and flash it but with the free downloads it's taking its time. Any help appreciated, I really want to unbrick my phone
Click to expand...
Click to collapse
This must be a international S8... Did you activate oem unlock in developer settings before flashing twrp
([emoji3590]09-09-18[emoji3590])

I'm not sure if it's international, it's most likely a Turkish version.
And yeah to your question

nekropok said:
I'm not sure if it's international, it's most likely a Turkish version.
And yeah to your question
Click to expand...
Click to collapse
But you know for a fact that there's a twrp version for your device.... Not good to do these expensive phones like that without officially having all the facts
([emoji3590]09-09-18[emoji3590])

Well it's too late for that now, I need actual solutions. I also tried smart switch - it doesn't recognize the phone

nekropok said:
Well it's too late for that now, I need actual solutions. I also tried smart switch - it doesn't recognize the phone
Click to expand...
Click to collapse
On the xda thread for your device there aren't no stock roms uploaded to Android host for fast download so you can flash in Odin and start the process of twrp again or just leave it alone you have a S8 it's good money
([emoji3590]09-09-18[emoji3590])

WHEW. Flashing a stock firmware seems to have fixed the issue. Mods can lock the thread.

nekropok said:
WHEW. Flashing a stock firmware seems to have fixed the issue. Mods can lock the thread.
Click to expand...
Click to collapse
You going to give up on twrp
([emoji3590]09-09-18[emoji3590])

I do want to root, but I don't want to approach it without knowing all my facts, do you have any suggestions for guides for Android 9.0?

nekropok said:
I do want to root, but I don't want to approach it without knowing all my facts, do you have any suggestions for guides for Android 9.0?
Click to expand...
Click to collapse
Just look in your device forum everything Is there however your device is a international cause it ends in with the F so twrp does work for your device..... You just need to find the specific one for your model once you have twrp you can install a android 9 custom rom
([emoji3590]09-09-18[emoji3590])

I had same issue as you and was pointed towards this thread may be of some use to you?
https://forum.xda-developers.com/sa...w-to/guide-root-install-twrp-samsung-t3747535

Problem on my S8
PoochyX said:
This must be a international S8... Did you activate oem unlock in developer settings before flashing twrp
([emoji3590]09-09-18[emoji3590])
Click to expand...
Click to collapse
Sorry but I have a serious problem. I have activated oem and debug usb on developer option, but I can't install TWRP. I have tried with odin, prince cosmy odin, odin patched but FAIL everywhere, please help me, I just want twrp and i want to install a custom rom. thanks in advance everyone. If is a problem answer me here, you can send me a pvt message. I tried it from 3 days with the same FAILS :_(

I had this problem too a year ago but wasn't able to reflash the official firmware, but when I went to Samsung they fixed it for free even though Knox was already tripped

FabiusMod said:
Sorry but I have a serious problem. I have activated oem and debug usb on developer option, but I can't install TWRP. I have tried with odin, prince cosmy odin, odin patched but FAIL everywhere, please help me, I just want twrp and i want to install a custom rom. thanks in advance everyone. If is a problem answer me here, you can send me a pvt message. I tried it from 3 days with the same FAILS :_(
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are you able to flash the stock firmware on it and get it to boot without TWRP installed?

I am with a stock rom now, The device works fine.