yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] whoosename:
I 'd try to reflash TWRP. Don' t forget to untick the "automatically reboot" checkbox. Then reboot manually following the steps in OP.
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] jagt28:
Hi, in my case everything works perfectly. No problems at all!

Regards

José Antonio
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] fabricio83it:
Hi people, after tried another time to unlock and root the T820 I'm stuck on a bootloop and need a stock rom, german version, oreo or nougat to be able to boot the tablet again? I already downloaded a lot of stock roms , but always i find a version the firmware doesn't have the CP file, and without the CP file, only with the three AP, BL and CSC the flash always fail. Can someone help me to find a oreo or nougat firmware in german version with the CP file too please? I really spent days and days downloading firmware and trying to flash unsuccessfully. Please I need to use the tablet for study!!! :crying::crying::crying:
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] jd1639:
Have you gone to sammobile.com? If you have the 820 you don't need the cp. That's for the modem and the 820 doesn't have one. The 825 does.
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] fabricio83it:
Yes, tried with more than one firmware and nothing, always stuck in fail on :(
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] jd1639:
Do you have the latest odin, 3.13.1? Older versions won't work.

Also, odin can be particular, use the usb ports in the back if your using a pc. Try different ports and cables.
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] fabricio83it:
My fault guys, sorry for the late, flashing with CSC and not CSC_Home worked now, I was able to flash stock rom and now Im trying some roms, with lineage 17 android 10 was stucked on bootloop till the end of the battery and tablet power off, tried Lineage 16 and SMT820 tweaked by rorymc928 but both fingerprint doesn't work and seems im not able to do backups in twrp too, because always the backup ends with error message and im not able to restore, any thoughts about that guys?
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] jd1639:
To get the fingerprint to work you need to flash the latest bootloader, csh9, with odin. Just flash the bl file and not any others. I haven't checked if you need to latest bootloader for twrp to work, but i don't have any problems using rorymc928 rom with the latest bootloader.
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] fabricio83it:
I did must download a pie stock rom and flash again only the BL file? Is it? Don't know if i understand well.
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] fabricio83it:
Tried and work like a charm, the s-pen looks good so far now, do you have any other suggestions and thankyou so much!!! :)
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] jd1639:
I am glad you got it working.
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] fabricio83it:
Do you have any other suggestions about? Like change kernel too or not? What else do you suggest to do now ? And thank you for your help! :)
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] elreymon:
just to check, noone here can mount the system partition from TWRP, once thesystem has booted from the first time, true?
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] bozkurtum:
samsung sm- t827 tablet recovery download ..?
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] Kattivius:
Device flashed with unauthorized software & locked

greetings,

I need some help from you guys...

I following exactly the instructions to flash TWRP and Magisk following the OREO ONLY section as I am on PIE.

Reading this post. Oreo section works for PIE.

1. Boot to TWRP

2. Install the Forced encryption patch: Tabs3_oreo_forced encryption_disabler

3. Format DATA using the *FORMAT DATA button* under the wipe options.

(NOTE - THIS WILL WIPE ALL INTERNAL STORAGE!)

4. Install Magisk

5. Reboot and check DATA is mountable

Done.

All went fine and after rebooting, the tablet started the configuration.. simple steps.

As soon as I rebooted, I had a terrible surprise (Seems I am unable to attach an image to show you!)

What I did:

I tried to download the original FW on OREO (so to try again the procedure) but I cant find a good FW.

I use ODIN to flash and I miss a file ; the CP file. I got the BL, AP and CSC but dont have CP. I guess this is the issue.

It seems there are many FW for the same tabled model... dont know why .. maybe country related????

Or I would have to pay for the download!

QUESTION:

Any one has a reliable site where to dl the FW and maybe not a just 15kb/sec???? :(

Possibly for

OREO

and

PIE

so I can try both.

QUESTION2:

what do you think gone wrong?

Why at first I had a working system and at first reboot, I had the security block?

Thanks for your help

kattivius

can someone
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] jd1639:
The best place to get firmware is sammobile.com. You'll have to register, but it's free. Download speeds are slow. There are different firmware for the region you are in.

Samsung has stated locking you out if you flash unauthorized firmware. I recently had a similar issue while rooting. If you flash the complete firmware, use csc and not csc-home you can get your tablet running again. Otherwise you have to wait 24 hours or something like that. Also, there is no cp for the 820. That is the modem file and is only for LTE models.

I recently installed Oreo and rooted the tablet so it will work. I did have to try a few times, including using Odin to flash the firmware again.
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] Kattivius:
ok, thanks.

What do you mean with waiting 24h?

to be able to flash again?

About different versions for my region: would that matter what I flash? I am in europe... as long as I can choose a language of my choice, should I care for anything else if I flash a german, Dutch or belgian FW?

PS

after flashing original FW, would I loose TWRP and Magisk?
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] jd1639:
You can flash with Odin without waiting. The waiting is something Samsung locks before you can boot the device, FRP, factory reset protection. There are a number of specific firmware for many countries in Europe. You should be able to find one that works for you. You will have to reinstall twrp and root again. Flashing with Odin will wipe the device and you'll have to reinstall all your apps and will lose data.
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] Kattivius:
Yes.

I was able to reinstall android PIE but was not able to install OREO (this is very strange that one works and the other not.).

It was late last night and finally gave up installing twrp.

For some reason did not let me install it with same preview procedure and got the message "Only official released binaries are allowed to be flashed" (or some like that).

I will keep trying.

Reading around I figure that easiest way to root and later install custom rom, is actually: twrp --> Magisk manager.

From what I read is the best solution to mask google, keep using apps that would be non functioning well with custom rom and rooting at same time. (https://odindownload.com/root-android/)

Do you have a take on that?

I appreciate for your feed back and help you giving me.

:highfive:
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] NullCode:
Good afternoon. I have no clue why, but Samsung introduced something called RMM or KnoxGuard from android 9 I guess. So you also need to flash the RMMbypass.zip (search on google you might find it) and let me give the steps.

Pre-requisites:

Have an SD Card ready with the force encrypt disabler, RMM Bypass zip (if you are on pie), and Magisk zip.

Steps:

1: MAKE SURE oem unlock is on.

2: Flash TWRP on ODIN without auto reboot checked.

3: After flashing completes, disconnect tab and press Power and Volume down until you see black screen. And immediately after that press Power + Vol Up + Home.

4: Once you get into TWRP, swipe to allow modifications.

5: Then flash the Force Encrypt disabler and also RMM Bypass.

6: Format Data (you know the one in which you have to type yes)

7: Reboot recovery.

8: Flash the RMM bypass again and Magisk zip.

9: Wipe cache & dalvik.

10: Reboot.

And voila you're done. Also hit thanks if this works it'd help loads.
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] Kattivius:
Much apreciate, thanks.

The thing is:

the first time I flashed TWRP, i did disabled the OEM lock.

- Installed TWRP

-Rebooted in android

- than I got the issue...

- managed to re-flash PIE...

Now I am trying the TWRP flashing again... I remember the oem unlock on option... BUT .. it is no more in the developer options!

I cant find it anymore!

Simply gone!

I checked and re-checked.. no where to be found!

Any idea?

Can I skip that step?

---------- Post added at 05:14 PM ---------- Previous post was at 04:28 PM ----------

===

OK, I find the way to get OEM unlock back.

Turns out that all the tutorial i read, did not wor.

The trick was to tap several time in the Software update/download and install till a windows shows up and check the software is update or not (do that a ad addition to all those tutorial out there).

Without even reboot, if you go back to the developer options you find the oem unlock option.

(link: https://www.youtube.com/watch?v=zhNhyT4F3e8)

Going to look for that file you mentioned and carry on flashing TWRP....

---------- Post added at 05:31 PM ---------- Previous post was at 05:14 PM ----------

Hi Again, I search about the RMM and I am confused... In a forum is mentioned:

This patch is compatible only with exynos Samsung devices

Those are ARm devices that seems to be different from qualcomm

This Samsung tablet has a Quad Core(2.15 GHz + 1.6 GHz Quad), Qualcomm APQ8096

Now I am no expert but Looks like the RMM is not compatible!

When you did the flash, what was your device?
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] Kattivius:
UPDATE

I have flashed TWRP now.

I also flashed Magisk and than Magisk manager. (no RMM Bypass )

It seems to be stable; I have rebooted to android several time.

My goal was to change ROM but I realized this tablet is not so good for changing unofficial roms (for android 10) so I guess I stay with official PIE and rooted.

Thanks for all your help.

If anything will stop working, I will report it.
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] bmwdroid:
[MENTION=7339058]Kattivius[/MENTION]

<I have flashed TWRP now...>

If I understand you right yours had Pie already on it and you only flashed TWRP + Magisk without any patch after OEM unlocking.

Correct?

I got my T825 already with Pie just a few days ago but might as well downgrade to Oreo if necessary.

Want to try the tweaked stock Pie ROM.

Edit few days later: flashed TWRP....tar.

Formated Data.

Flashed tweaked ROM.

No patch necessary when on Pie.
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] NullCode:
Good Morning. Sorry for the very late response. I know that you've flashed TWRP already, but I just wanted to answer your question. I saw somewhere on THIS TWRP forum that people were having trouble with RMM and a senior member told people to flash the RMM bypass (even though it was Exynos only he said it was fine, so I wanted to carry the information to you.) Also, when i flashed decryptor and RMM bypass, I had the SM-T820 variant of the Tab S3. I checked and yeah I flashed it. I got no problems, but I'm happy you've fixed your issue.

Have a great day,

Ishaq
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] AndroPie:
While installing TWRP recovery, I failed to comply with step 4 so the Android recovery was active but the buttons are not working and I am stuck with this screen - [redacted]

What should I do now? Please HELP!

Edit: I have resolved this issue by pressing Home + Power + Volume down
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] Alex20137:
So on Android 9 Pie Do I need any patches or is it good from the get go

And if I do need patches, can anyone link them? Thanks
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] bmwdroid:
I can assure that you don't need any when trying to flash TWRP on T825 with stock 9.
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] Alex20137:
HELP failed verification sos PLEASE

Please how to install magisk android 9!
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] bmwdroid:
Gotta flash it in TWRP.

As always, if not already included in the ROM.
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] Alex20137:
OK I've fixed everything. PATCH REQUIRED ANDROID 9 SM-t825 universal DM verify / force encrypt patch (search XDA)

edit just to clarify it wouldnt boot without a patch on latest android 9 firmware
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] ivanox1972:
Strange issue. I installed all without problems. Root stock rom, got data mount, installed lineage and one ui rom... Backup both, restored, changed...

All normal. But now I wanted to back again from lineage to oneui rom. And somehow I lost data mount, can't wipe, can't see internal of course.

I have few backups on sd card, how to regain data mount, wipe and restore oneui rom?

Thanks
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] Alex20137:
Use the treble recovery works much better I had this issue you need to format DATA PARTITION by converting to ext2 and back to ext4
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] Alex20137:
[MENTION=4899305]ashyx[/MENTION] please post your device tree!
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] NullCode:
Heya [MENTION=4899305]ashyx[/MENTION], it would be incredible if you could provide the device tree for the Tab S3s. I have tried to make a recovery tree from scratch and its SO DIFFICULT for tablets than phones. I started the sky hawk project hoping it would be as easy as the phone I compiled for [from scratch] and oh my, it wasn't. So please, give.

Well I am not going to over praise you by saying dumb stuff but you have the real deal, and this recovery works like a CHARM, like there is NOTHING that doesn't work. So yeah please.

Edit: Literally noticed alex also asking for the device tree, so pls man, there are 2 people asking for the tree now.

Edit: Day 2 of me begging [MENTION=4899305]ashyx[/MENTION] for the device tree
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] reygm:
Works on android 9?
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] NullCode:
yup worked flawless on my T820 android Pie. Just follow the Oreo instructions and remember to flash Magisk & the RMM / KnoxGuard Bypass zip at the end before rebooting
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] PatadaVoladora!:
Hola !

Lo probé en mi Tablet GALAXY S3 SM-T820 y funciona bien.

Gracias por compartir.
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] BenG7:
Hi

I have a SM-T820, I flashed the latest tweaked rom (twrp 3.2.1-1_ashyx) but to achieve a leaner OS i decided to flash the lineageOS 17.1, unfortunately I missed the full wipe and went for a facory reset --> boot loop on restart

but now when I go back to twrp and try to do the full wipe i get:

leaving me with no access to my storage.

Does anyone know what I should do next please?

Thanks

[EDIT] SOLVED, I could sort it out following these instructions.
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] BenG7:
[EDIT2] following the above steps, TWRP won't let me flash magisk anymore as it does not mount data (where magisk & the rom to be flashed are saved) + it does not record any of my settings (e.g. vibration) and I need to reset them each time I reboot into recovery...

I planned on reflashing twrp + running the dm verify again but my boot loader is now pie and dm verify provided is for Oreo...

any help please?
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] bmwdroid:
@BenG7 already thought of starting from scratch by flashing stock?
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] BenG7:
Thanks @bmwdroid, I will try it but first, could you please confirm these are the steps I should go thru given the idea is I want to run a rooted LineageOS 17.1 (no GApps whatsoever) and a working TWRP as opposed to what I currently have (see final lines at the end); as you will see, this is a compilation of steps that can be found across the TWRP, LineageOS threads but I

must

be getting it wrong somewhere... well, first I didn't do it from a stock rom - that is noted!):

put my t820 in DOWNLOAD mode

flash latest stock (T820XXU3CTD5 for me) with odin

reboot to latest stock

Go into system and click seven times on build to get to show the Developpers options

in the developper options allow OEM unlock & USB debugging

put my t820 device in DOWNLOAD mode again.

uncheck Auto reboot in Odin's Options tab

Load the latest twrp available twrp_3.2.1-1_T820_28518.tar into the AP slot in the Log tab

hit start

after ODIN reports PASS, press POWER + HOME + VOL DOWN to reboot to recovery - as soon as the screen goes blank, change to VOL UP whilst still holding POWER + HOME --> this will get me into TWRP recovery

to disable forced encryption, mount internal storage (DATA) and disable dm-verity I will then flash (thru Install in TWRP) the Forced encryption patch: Tabs3_oreo_forced encryption_disabler (previously copied from laptop to internal storage in TWRP)

once this is done, without rebooting (please confirm), I shall format DATA using the *FORMAT DATA button* / "yes" under the wipe options (this will WIPE ALL INTERNAL STORAGE!)

once this is done, without rebooting (please confirm), I shall then flash (thru Install in TWRP) Magisk 20.4 (also previously copied from laptop to internal storage in TWRP)

reboot and check DATA is mountable (Please confirm this is a reboot to System or to Recovery)

backup all partitions (at least efs) and store somewhere (in order not to lose IMEI)

full wipe all = factory reset + format data thru dedicated button + "yes" under the wipe options in TWRP

flash (thru Install in TWRP) LineageOS 17.1 (also previously copied from laptop to internal storage in TWRP)

reboot to system which should now be a rooted LineageOS

go into system and click seven times on build to get to show the Developpers options, allow USB debugging.

In my previous attempts, I noticed at the end of the lineageOS flash, the process tells me it couldn't find the magisk addon so I assumed it was not rooted and I flashed magisk again

+ when I rebooted into recovery:

- I still need to allow modifications

- my twrp settings (time zone + vibration) are not saved

- data is not mounted

Thanks a lot in advance for your help.
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] bmwdroid:
Expand the quote as I edited your post.

Gotta admit I'm using rorys tweaked ROM which is debloated and I deleted even bloats more before flashing.

I replaced the mentioned TWRP with twrp_3.2.1-1_T825_ashyx_Valera1978_repack.img.

Exchange Magisk to the newer one.

Might be possible, that OEM setting will not be displayed directly after turning on dev options because some time most pass after dev option is set.

To bypass this try to set time manually one month back before connecting to the internet.

That worked for mine several times.

On all my devices I've flashed Magisk either directliy after the custom ROM or after a first reboot but never before flashing the ROM.

On my devices I do the following:

Unlocking if necessary or flashing ch-autoroot.

TWRP flash in AP with Odin (auto reboot unchecked)

rebooting to new TWRP recovery

Backing up everything wanted or needed

Wiping all partitions and additionally formating data.

Custom ROM (with or without Gapps) flashed

either reboot to flash Magisk while on some devices it works to flash directly.

Never had problems with not mounting Data or encryption so I don't now much about this
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] BenG7:
@bmwdroid Thanks A LOT for your help.

Your device is the the SM-T825, right?

[EDIT] actually the issue is with TWRP NOT LineageOS:

LineageOS 17.1 is properly installed and running but I cannot root it as, each time I reboot into recovery:

- I still need to allow modifications

- my twrp settings (time zone + vibration) are not saved

- data is not mounted (and therefore cannot access the magisk 20.4 zip previously copied from my laptop to the internal storage of the tablet while running LOS) - will try to copy magisk 20.4 zip to an SD card...

[EDIT2] TWRP won't even let me mount external SD.

Please see my additional comments, after your own, below (expand quote again):
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] bmwdroid:
@BenG7 to not enlarge the post to much I start newly here.

Yes, mine is T825.

TWRP I got from here and I assumed @Valera1978 made it for both models as he didn't quote differenty, but you may be right that it's only for mine. Did you try 3.1.0-1 as well?

I do have some devices on which TWRP doesn't save Time settings either.

I got confused with accessing TWRP after Odin flash as well as I only boot with button combo and it starts TWRP without any further buttons need to be pressed. Just a blue note appears on top saying "recovery booting" then you can release the buttons.

Magisk 21.1 from here.

I wonder why you bother about encryption problems at all as (acc. to what the dev wrote it's only relevant for Oreo) and you were either flashing debloated Pie or LOS17 =Q, or do I misunderstand something?

Hope I didn't miss a point.
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] BenG7:
Thanks again, it's probably me getting all mixed up to be honest!

the repack by Valera1978 clearly states T825 in its name...

So I flashed twrp again.

After it was flashed, I rebooted into recovery: data (nor anything else is mounted) so I repaired data from ext2 to ext4 to be able to gain access to data on the next reboot (the process erases everything on the data partition).

On rebooting again data is mounted (with a TWRP folder inbside) (only data is mounted, external sd is not mounted / mountable) so I could copy LOS rom + magisk (21.1) to data.

Once both copied, I flashed LOS, when finished I also flashed magisk

Then I rebooted to system.

LOS starts no pb, LOS is rooted but each time I reboot into recovery:

- I still need to allow modifications

- my twrp settings (time zone + vibration) are not saved

- data / Micro SD card / USB OTG (all reporting 0 MB BTW) are not mounted / mountable

- & when selecting storage, only internal storage (0mb) is selectable

meaning that if I need to flash anything, I will first need to repair the data again (as explained above) to get access to it, erasing everyhting in the process and I will need to reinstall eveything...

It sounds like this is how it is intended to work; FAR from ideal really...

Thanks A LOT for your help anyway.
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] bmwdroid:
@BenG7 sorry that I couldn't help.

Seems to be a problem with TWRP for T820.

Perhaps you want to try this one.
[Samsung Galaxy Tab S3 ROMs, Kernels, Recoveries, &] BenG7:
OK, from reading the whole thread, I'm going to give it another try after I re-flashed the latest stock (pie); instructions on how to root the SM-T82x under Pie are not provided in the OP so I'm providing them here for reference:

@ashyx / @rorymc928 / @LedgendaryEpics: please correct me if I'm wrong (will do this tomorrow as it is pretty late now here)

Flash with ODIN using the AP slot.

1. Put your device in DOWNLOAD mode,

2. Uncheck Auto reboot,

3. Load the adequate twrp_3.2.1-1_T820_28518 / twrp_3.2.1-1_T825_29518 into the AP slot and hit start,

4. After flashing and ODIN reports PASS immediately reboot to recovery by holding POWER + HOME + VOL DOWN.

As soon as the screen goes blank change to VOL UP whilst still holding POWER + HOME --> You should now be in TWRP recovery.

5. Install the RMM V3 bypass

6. Install the Dmverity and encryption patch

7. Format DATA using the *FORMAT DATA button* under the wipe options.

(NOTE - THIS WILL WIPE ALL INTERNAL STORAGE!)

8. Install Magisk

8. Reboot and check DATA is mountable --> Done.