Hi all just wanted to find out how to do this
Thanks
edit:
I want to root just so I can recover files as most apps must have root.
Then I will unroot to get samsung pay and reset the knox counter.
abuch47 said:
Then I will unroot to get samsung pay and reset the knox counter.
Click to expand...
Click to collapse
Tripping Knox is permanent. You cannot reset Knox, even by unrooting your phone. Only Samsung can do it, and even so, it's very rare.
CafeKampuchia said:
Tripping Knox is permanent. You cannot reset Knox, even by unrooting your phone. Only Samsung can do it, and even so, it's very rare.
Click to expand...
Click to collapse
Thanks so I have done a bit more research and like you said permanent and then therefore Samsung Pay will never work. It will be a while yet before its available in AUS anyway so I'm not bothered.
So rooting is back on the cards to recover my camera album I accidentally deleted. It seems so daunting and over my head though. I don't want to brick my phone.
Do you have a easy and effective recommendation for backing up the note 5 before I head down the path of rooting?
Even then it's not very likely you can get the pictures back. Every time you touch your phone to do anything you are likely to overwrite those old memory locations - even by booting the phone.
Sent from my SM-N920V using Tapatalk
^Someone else said that and its already been a week. I may try anyway to test out the functionality of a rooted phone. What are the benefits of rooting for a non-power user?
Anyone have a recommended backup service?
Been on Xtrestolite for months now and at first it was great, but the battery drains quickly now, can't answer phone calls and fast charging doesn't work (works on other devices).
Basically, I want to use this thread to go back to stock: http://forum.xda-developers.com/galaxy-s6/general/stock-firmware-official-stock-firmware-t3086387
The MM update for T-mobile is coming out soon so I am interested in the stock version of that (so my phone calls work).
My question is basically that I updated the modem and the bootloader to the Xrestolite ROM and the ROM thinks my phone is an S6 edge (just a regular S6).
If I use ODIN to flash stock on my device, does it also flash the stock modem and bootloader for my cell phone provider as well? (USA T-Mo.)
Are there any additional steps I need to do to go back to the stock modem/bootloader/anything else? Will I be able to update to MM OTA?
darklime said:
Been on Xtrestolite for months now and at first it was great, but the battery drains quickly now, can't answer phone calls and fast charging doesn't work (works on other devices).
Basically, I want to use this thread to go back to stock: http://forum.xda-developers.com/galaxy-s6/general/stock-firmware-official-stock-firmware-t3086387
The MM update for T-mobile is coming out soon so I am interested in the stock version of that (so my phone calls work).
My question is basically that I updated the modem and the bootloader to the Xrestolite ROM and the ROM thinks my phone is an S6 edge (just a regular S6).
If I use ODIN to flash stock on my device, does it also flash the stock modem and bootloader for my cell phone provider as well? (USA T-Mo.)
Are there any additional steps I need to do to go back to the stock modem/bootloader/anything else? Will I be able to update to MM OTA?
Click to expand...
Click to collapse
You can restore original firmware using Samsung Kies or Smartswitch.
cwhiatt said:
You can restore original firmware using Samsung Kies or Smartswitch.
Click to expand...
Click to collapse
I plan on using ODIN to flash the original firmware. Does the original firmware include the original bootloader and modem or do I have to do those separately?
darklime said:
I plan on using ODIN to flash the original firmware. Does the original firmware include the original bootloader and modem or do I have to do those separately?
Click to expand...
Click to collapse
I have no idea. I always restored via Kies.
darklime said:
I plan on using ODIN to flash the original firmware. Does the original firmware include the original bootloader and modem or do I have to do those separately?
Click to expand...
Click to collapse
The full stock firmware package will have bootloader and modem. It will take you to basically like you just bought it except Knox will stay tripped.
Sym_Link said:
The full stock firmware package will have bootloader and modem. It will take you to basically like you just bought it except Knox will stay tripped.
Click to expand...
Click to collapse
Thanks for the reply! Since knox is tripped, will I be able to do OTA updates or download apps like Samsung Pay or Android Pay? I heard there is a method like using the app called "Triangle Away" to remove the knox tripped counter.
darklime said:
Thanks for the reply! Since knox is tripped, will I be able to do OTA updates or download apps like Samsung Pay or Android Pay? I heard there is a method like using the app called "Triangle Away" to remove the knox tripped counter.
Click to expand...
Click to collapse
You will be able to get OTA update with tripped knox if fully stock. Samsung Pay will not work if knox is tripped. Android Pay will work if not rooted( it will also work with systemless root and a couple changes to su file but then you are no longer stock and no OTA). There is currently no way of resetting knox short of replacing phone.
s89281b said:
You will be able to get OTA update with tripped knox if fully stock. Samsung Pay will not work if knox is tripped. Android Pay will work if not rooted( it will also work with systemless root and a couple changes to su file but then you are no longer stock and no OTA). There is currently no way of resetting knox short of replacing phone.
Click to expand...
Click to collapse
I'm going to try to use triangle away as an attempt to reset knox. Should I flash the stock firmware first then try Triangle away or vice-versa?
darklime said:
I'm going to try to use triangle away as an attempt to reset knox. Should I flash the stock firmware first then try Triangle away or vice-versa?
Click to expand...
Click to collapse
S6 is not listed as a supported device for triangle away. I would not waste my money trying it. Just flash stock firmware. Only loss is Samsung pay.
s89281b said:
S6 is not listed as a supported device for triangle away. I would not waste my money trying it. Just flash stock firmware. Only loss is Samsung pay.
Click to expand...
Click to collapse
That sucks. I really wanted to try it out. MM is coming out for my S6 in my country soon so I'm hoping battery and RAM management is better because recently on my ROM that was oh-so popular drains the hell out of my standby time and I cannot make/answer phone calls at times. At least I can try Android Pay. Thanks for answering my questions.
Hi.
Is it possible to flash TWRP and root with magisk, and then flash relevant stock firmware updates from Samsung using Odin as and when they come?
If so, would flashing said firmwares remove root and TWRP, and/or wipe data? Requiring re flashing TWRP and rooting again after each update?
Basically I'd like to stay relatively stock, just with root and TWRP. But I want to be able to keep the phone up to date without having to use custom ROMs.
And yes, I know once TWRP or root are used Knox is tripped and there's no way to get it back or magically make the warranty valid again. I don't care about that.
beta546 said:
Hi.
Is it possible to flash TWRP and root with magisk, and then flash relevant stock firmware updates from Samsung using Odin as and when they come?
If so, would flashing said firmwares remove root and TWRP, and/or wipe data? Requiring re flashing TWRP and rooting again after each update?
Basically I'd like to stay relatively stock, just with root and TWRP. But I want to be able to keep the phone up to date without having to use custom ROMs.
And yes, I know once TWRP or root are used Knox is tripped and there's no way to get it back or magically make the warranty valid again. I don't care about that.
Click to expand...
Click to collapse
One month no answer, this forum is quite dead
dryspuri said:
One month no answer, this forum is quite dead
Click to expand...
Click to collapse
Yep, it's not great...
Instead of waiting, you could do a search on your own. This stuff is not from yesterday.
The answer is in s8, s8+, note8, s8, s9+ section. Basically someone has discussed it since Sammy introduced 7 days oem lockout, and ways to circumvent it... Those that know, don't feel like repeating endlessly, when time and search do the job.
The rest discuss wallpapers, screen protectors, cases, and justifications why root is no longer necessary (this from North American users, as if they could).
Sent from my phone
I had been looking for a new phone for awhile. Settled on a Note 9 because I wanted to try using the S Pen for work and dislike the Note 10 design. However, they are still sold at full price where I live, so I bought one secondhand. Everything seems generally fine with it, minus some freezing or weird reactions when it charges for awhile or restarts. But I have been skeptical of throwing passwords (personal and for work) on it to this point. Thats because I read an article about potential root level or firmware level spyware that remains after a reset.
I did a reset AND even took it to an official service center to flash new firmware (but they said they cannot do it there, but they did some kind of more advanced reset?). I checked my Knox counter in the Download menu and it reads 0x00000, maybe more or less zeros. Samsung pass, pay, health, and secure folder all seem to work (I can register for them, use the bio sensor). That all sounds like it has not been tampered with in any way, correct?
Thanks for the help.
IqD said:
I had been looking for a new phone for awhile. Settled on a Note 9 because I wanted to try using the S Pen for work and dislike the Note 10 design. However, they are still sold at full price where I live, so I bought one secondhand. Everything seems generally fine with it, minus some freezing or weird reactions when it charges for awhile or restarts. But I have been skeptical of throwing passwords (personal and for work) on it to this point. Thats because I read an article about potential root level or firmware level spyware that remains after a reset.
I did a reset AND even took it to an official service center to flash new firmware (but they said they cannot do it there, but they did some kind of more advanced reset?). I checked my Knox counter in the Download menu and it reads 0x00000, maybe more or less zeros. Samsung pass, pay, health, and secure folder all seem to work (I can register for them, use the bio sensor). That all sounds like it has not been tampered with in any way, correct?
Thanks for the help.
Click to expand...
Click to collapse
What's the model number?
Sm-n960n. Korean exynos model, 512gb.
IqD said:
Sm-n960n. Korean exynos model, 512gb.
Click to expand...
Click to collapse
If you are worried about remaining spyware of files, download the latest rom from sammobile and then flash with odin.
Just simply search how to use sammobile or how to use odin if you need help. Hundreds of years have posted how good and answered those questions already
I used to flip phones up until a couple years ago. I've bought and sold hundreds, maybe thousands of used phones, most of which had my accounts on them at one point and time. I think as long as the phone is running official firmware, isn't bootloader unlocked/rooted, and you've reset it, it should be fine. Of course you run the risk that someone has hacked it, installed spyware at the system level, and somehow overwritten the status to show as official such that the spyware persists even after a reset, but that's highly unlikely.
Sent from my SM-N960U using Tapatalk
Bober_is_a_troll said:
If you are worried about remaining spyware of files, download the latest rom from sammobile and then flash with odin.
Just simply search how to use sammobile or how to use odin if you need help. Hundreds of years have posted how good and answered those questions already
Click to expand...
Click to collapse
Thanks for the idea. I considered this but would like to avoid just because sammobile is unofficial, so it would still leave me slightly apprehensive even if everyone is using it.
Everything I read seems to suggest that the phone was never rooted if all of the Samsung apps work and the Download KNOX counter is 0x0. Just wanting to confirm by someone more knowledgeable about this.
joshw0000 said:
I used to flip phones up until a couple years ago. I've bought and sold hundreds, maybe thousands of used phones, most of which had my accounts on them at one point and time. I think as long as the phone is running official firmware, isn't bootloader unlocked/rooted, and you've reset it, it should be fine. Of course you run the risk that someone has hacked it, installed spyware at the system level, and somehow overwritten the status to show as official such that the spyware persists even after a reset, but that's highly unlikely.
Sent from my SM-N960U using Tapatalk
Click to expand...
Click to collapse
Thanks. I don't think it has ever been unlocked or rooted, but is there a guaranteed way to know?
IqD said:
Thanks for the idea. I considered this but would like to avoid just because sammobile is unofficial, so it would still leave me slightly apprehensive even if everyone is using it.
Everything I read seems to suggest that the phone was never rooted if all of the Samsung apps work and the Download KNOX counter is 0x0. Just wanting to confirm by someone more knowledgeable about this.
Thanks. I don't think it has ever been unlocked or rooted, but is there a guaranteed way to know?
Click to expand...
Click to collapse
Go to settings > about phone > status and it should say "official". That would tell you if the phones operating system has been modified (rooted). As far as checking for bootloader unlock, I'm not sure on Samsung's but on a Google Pixel once the bootloader is unlocked it'll show an unlocked lock on the bootscreen every time that you reboot the phone. North American snapdragon variants of Note 9's do not have an unlockable bootloader so if your phone is a carrier branded phone, the bootloader can't be unlocked. You can Google your model # to figure out which one you have.
You can also check that all functions work properly. Typically apps like Samsung Pay won't work if the phone is rooted. There are ways around that where you can trick the phone into thinking it's not rooted to get those apps to work so, again, that's not a full proof way to check. For example, I'm using an AT&T variant that's been sim unlocked and flashed with Verizon firmware and it works 100% like a Verizon phone.
I'd say, reboot the phone. If you don't see an unlocked icon it's probably not unlocked. Go into settings and take note of your model #
Then go online and research about Odin and flashing official firmware via your computer. Download the latest official firmware for your phone, flash it using Odin, and then you'll know that there's no spyware on your phone. That would essentially be the equivalent of wiping a computer and reinstalling Windows.
Sent from my SM-N960U using Tapatalk
joshw0000 said:
Go to settings > about phone > status and it should say "official". That would tell you if the phones operating system has been modified (rooted). As far as checking for bootloader unlock, I'm not sure on Samsung's but on a Google Pixel once the bootloader is unlocked it'll show an unlocked lock on the bootscreen every time that you reboot the phone. North American snapdragon variants of Note 9's do not have an unlockable bootloader so if your phone is a carrier branded phone, the bootloader can't be unlocked. You can Google your model # to figure out which one you have.
You can also check that all functions work properly. Typically apps like Samsung Pay won't work if the phone is rooted. There are ways around that where you can trick the phone into thinking it's not rooted to get those apps to work so, again, that's not a full proof way to check. For example, I'm using an AT&T variant that's been sim unlocked and flashed with Verizon firmware and it works 100% like a Verizon phone.
I'd say, reboot the phone. If you don't see an unlocked icon it's probably not unlocked. Go into settings and take note of your model #
Then go online and research about Odin and flashing official firmware via your computer. Download the latest official firmware for your phone, flash it using Odin, and then you'll know that there's no spyware on your phone. That would essentially be the equivalent of wiping a computer and reinstalling Windows.
Click to expand...
Click to collapse
yeah.. i whouldint fall for that system/status official crap. as you can see in the screenshot i posted from my rooted n960n.
the only real way is to check if knox is tripped is in DL mode( turn phone off. hold bixby and vol down button while inserting a usb cable hooked to a computer.).
also flashing a stock firmware on an FRP locked phone wont do **** if someone has had their accounts logged in/registered on it and have not reset it correctly.
surprised you dont know this.
IqD said:
Sm-n960n. Korean exynos model, 512gb.
Click to expand...
Click to collapse
FYI - This phone does have an unlockable bootloader.
I'd recommend using Bobby's advice and flash the latest firmware with Odin. If the phone is not already on the latest update, you could flash one firmware less than current and then let the phone download and install an OTA to the current version. You'll know that its official if the phone successfully downloads and installs the OTA.
Sent from my SM-N960U using Tapatalk
---------- Post added at 07:35 PM ---------- Previous post was at 07:31 PM ----------
bober10113 said:
yeah.. i whouldint fall for that system/status official crap. as you can see in the screenshot i posted from my rooted n960n.
the only real way is to check if knox is tripped is in DL mode( turn phone off. hold bixby and vol down button while inserting a usb cable hooked to a computer.).
also flashing a stock firmware on an FRP locked phone wont do **** if someone has had their accounts logged in/registered on it and have not reset it correctly.
surprised you dont know this.
Click to expand...
Click to collapse
Not sure why you're trying to call me out when I clearly said there are ways for it show official if it's rooted. Also, no one said anything about FRP. If the phone was FRP locked they wouldn't be able to use it at all... Unless you know how to remove an FRP lock, which I do. At that point the phone would work/be a normal phone.
Sent from my SM-N960U using Tapatalk
joshw0000 said:
FYI - This phone does have an unlockable bootloader.
I'd recommend using Bobby's advice and flash the latest firmware with Odin. If the phone is not already on the latest update, you could flash one firmware less than current and then let the phone download and install an OTA to the current version. You'll know that its official if the phone successfully downloads and installs the OTA.
Sent from my SM-N960U using Tapatalk
---------- Post added at 07:35 PM ---------- Previous post was at 07:31 PM ----------
Not sure why you're trying to call me out when I clearly said there are ways for it show official if it's rooted. Also, no one said anything about FRP. If the phone was FRP locked they wouldn't be able to use it at all... Unless you know how to remove an FRP lock, which I do. At that point the phone would work/be a normal phone.
Click to expand...
Click to collapse
point taken on the FRP lock but the real point I was making is that the system status is bogus:
joshw0000 said:
Go to settings > about phone > status and it should say "official". That would tell you if the phones operating system has been modified (rooted).
Click to expand...
Click to collapse
bober10113 said:
point taken on the FRP lock but the real point I was making is that the system status is bogus:
Click to expand...
Click to collapse
You obviously didn't read the entire comment:
"There are ways around that where you can trick the phone into thinking it's not rooted to get those apps to work so, again, that's not a full proof way to check."
Or this comment:
" I used to flip phones up until a couple years ago. I've bought and sold hundreds, maybe thousands of used phones, most of which had my accounts on them at one point and time. I think as long as the phone is running official firmware, isn't bootloader unlocked/rooted, and you've reset it, it should be fine. Of course you run the risk that someone has hacked it, installed spyware at the system level, and somehow overwritten the status to show as official such that the spyware persists even after a reset, but that's highly unlikely."
There are a lot of ways to check. I pointed out some of the simpler ways. None of which are truly bullet proof. Hell, back in the day we could reset knox counters so if someone is going to the extreme to install some spyware and they're smart enough to install anything that would persist a factory reset, even checking knox isn't a full proof method.
And your screenshot really doesn't tell me anything. It's possible to have an unlocked bootloader AND official firmware at the same time. The operating system and bootloader are two different things. It's only when you modify the system that you have to hack the status to make it say official.
Sent from my SM-N960U using Tapatalk
joshw0000 said:
You obviously didn't read the entire comment:
"There are ways around that where you can trick the phone into thinking it's not rooted to get those apps to work so, again, that's not a full proof way to check."
There are a lot of ways to check. I pointed out some of the simpler ways. None of which are truly bullet proof. Hell, back in the day we could reset knox counters so if someone is going to the extreme to install some spyware and they're smart enough to install anything that would persist a factory reset, even checking knox isn't a full proof method.
Click to expand...
Click to collapse
fine but i mean, why ask a user to validate the state of their device via the worst possible method of them all?
he even already posted in OP that he went to DL mode to check the knox fuse status so would supersede by far the need to check via software/status.
edit
and the photo of my device status was just a way to show how i know device actual status and bootlaoder state aren't linked. especialy when rooted devices can spoof software status but none cane spoof fuse state in DL mode. so not sure why you are trying to convince me of something i just proved. u can say u agree next time.
bober10113 said:
fine but i mean, why ask a user to validate the state of their device via the worst possible method of them all?
he even already posted in OP that he went to DL mode to check the knox fuse status so would supersede by far the need to check via software/status.
Click to expand...
Click to collapse
No actually he didn't. He never said he went to DL mode, he just said the knox counter says 0x0. That can be checked via apps from the phone. If the phone was rooted, it could be manipulated to show 0x0 when it's really not.
You're focusing on one sentence dude. Get your panties out of a wod and read the whole comment.
Sent from my SM-N960U using Tapatalk
joshw0000 said:
No actually he didn't. He never said he went to DL mode, he just said the knox counter says 0x0. That can be checked via apps from the phone. If the phone was rooted, it could be manipulated to show 0x0 when it's really not.
You're focusing on one sentence dude. Get your panties out of a wod and read the whole comment.
Click to expand...
Click to collapse
lol. but i did read he went to download menu which i think we can interpret it as download mode. but hey i might wrong. can you show me anywhere in the OS where download menu is?
IqD said:
I checked my Knox counter in the Download menu and it reads 0x00000, maybe more or less zeros.
Click to expand...
Click to collapse
bober10113 said:
lol. but i did read he went to download menu which i think we can interpret it as download mode. but hey i might wrong. can you show me anywhere in the OS where download menu is?
Click to expand...
Click to collapse
What a troll.
Sent from my SM-N960U using Tapatalk
joshw0000 said:
What a troll.
Click to expand...
Click to collapse
that's the spirit!
bober10113 said:
lol. but i did read he went to download menu which i think we can interpret it as download mode. but hey i might wrong. can you show me anywhere in the OS where download menu is?
Click to expand...
Click to collapse
joshw0000 said:
No actually he didn't. He never said he went to DL mode, he just said the knox counter says 0x0. That can be checked via apps from the phone. If the phone was rooted, it could be manipulated to show 0x0 when it's really not.
You're focusing on one sentence dude. Get your panties out of a wod and read the whole comment.
Sent from my SM-N960U using Tapatalk
Click to expand...
Click to collapse
Sorry for the confusion. I was referring to the Download mode by hitting the mentioned buttons on restart. The KNOX reads 0x0000. Also, it says OEM Lock: On. Then you are both saying the phone is safe?
Also, when I first got it, it did find an update OTA and installed it.
IqD said:
Sorry for the confusion. I was referring to the Download mode by hitting the mentioned buttons on restart. The KNOX reads 0x0000. Also, it says OEM Lock: On. Then you are both saying the phone is safe?
Also, when I first got it, it did find an update OTA and installed it.
Click to expand...
Click to collapse
no confusion on my part. i read and understood you correctly the 1st time around.
at first glance your device looks ok but...
additionally, there are ways to check if the device is off a lease with a ESN check. meaning if someone sold you a device still on contract. some sell contractual phones and after a period of time they will get blacklisted since the contract is never payed off fully. so device would appear to work fine and one day they just stop getting a signal and esn/imei get blacklisted.
side note:
surprised that this was not brought up earlier in the conversation as a factor to watch out for by some "experianced in the field flipping devices" user instead of stating the obvious like device status and the unreliable means to check it. especialy since, said user stated buying and selling hundred and even thousands of phones...!? ESN state would be no. 1 in the check list if things to watch out for.
anyways back to the current case, there are ESN/IMEI check services in the web to see status of device: stolen, still on contract...etc. i cannot provide any suggestion to these services unfortunately. this is something you need to check yourself or ask around.
good luck
IqD said:
I had been looking for a new phone for awhile. Settled on a Note 9 because I wanted to try using the S Pen for work and dislike the Note 10 design. However, they are still sold at full price where I live, so I bought one secondhand. Everything seems generally fine with it, minus some freezing or weird reactions when it charges for awhile or restarts. But I have been skeptical of throwing passwords (personal and for work) on it to this point. Thats because I read an article about potential root level or firmware level spyware that remains after a reset.
I did a reset AND even took it to an official service center to flash new firmware (but they said they cannot do it there, but they did some kind of more advanced reset?). I checked my Knox counter in the Download menu and it reads 0x00000, maybe more or less zeros. Samsung pass, pay, health, and secure folder all seem to work (I can register for them, use the bio sensor). That all sounds like it has not been tampered with in any way, correct?
Thanks for the help.
Click to expand...
Click to collapse
Reading this thread I've come to the conclusion that you should sell your rootable and boot unlockable device and buy a locked down USA model.
Thank me later. Least you'll be able to sleep well now.
Sent from my SM-G975U using Tapatalk
IqD said:
Sorry for the confusion. I was referring to the Download mode by hitting the mentioned buttons on restart. The KNOX reads 0x0000. Also, it says OEM Lock: On. Then you are both saying the phone is safe?
Also, when I first got it, it did find an update OTA and installed it.
Click to expand...
Click to collapse
It's about as safe, in terms of spyware, as you'll ever get from a used phone. I would assume you checked the ESN before buying it but if not, run a check with swappa.com/esn and checkesnfree.com to make sure it's clean. Screenshot the results and save them. Depending on your carrier you can likely run a check on their website and/or call support and ask them as well. As with any unlocked phone, know that you may not get all of the features that a carrier branded phone would have (i.e. I couldn't get WiFi calling working on a Korean S10 on Verizon).
Sent from my SM-N960U using Tapatalk
I just purchased a Galaxy Tab S8 (SM-X700 WiFi) in China and I want to replace the chinese firmware with US one. Are there any special considerations I need to know or can I just follow the rooting guide in the current post? Thanks!
PMB2714 said:
I just purchased a Galaxy Tab S8 (SM-X700 WiFi) in China and I want to replace the chinese firmware with US one. Are there any special considerations I need to know or can I just follow the rooting guide in the current post? Thanks!
Click to expand...
Click to collapse
You don't need to root to change firmware. Just re-flash your device with US firmware and if you want you can change code as well so it keeps getting US firmware updates instead of Chinese ones.
Rooting it will void warranty all together since rooting needs bootloader unlock and that trigers KNOX permanent and apps like samsung pass, secret folder will stop working permanently as well. Since they need KNOX to work, but since KNOX is broken/permanently disabled, then they won't work.
Thanks for the advice and information! I was hoping there was an option to update the region without rooting, but I wasn't sure. Cheers!
PMB2714 said:
Thanks for the advice and information! I was hoping there was an option to update the region without rooting, but I wasn't sure. Cheers!
Click to expand...
Click to collapse
No problem, reason why you can flash other region is because those firmware are counted as stock. Only difference in them would be some apps that are preinstalled and such.
So as long it's stock firmware you don't need to touch the bootloader.
Might not be necessary to even flash a new firmware and loose data.
Use this tool: https://samfw.com/blog/samfw-frp-tool-1-0-remove-samsung-frp-one-click
Under adb commends get a list of CSCs, see if the one you want is there. Then you can go back to the tool's main screen and change your CSC. Takes 10 seconds + a reboot, no data loss.
Worked for me both on my Tab S8+ and S22+.