yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy Tab A series Guides, News, & Discus] VampiruX:
I use a SDXC 256GB card in exFat. I can try with a 64gb card, but only for testing as it is too smal to accommodate all ma data. Will do that tomorrow.
[Samsung Galaxy Tab A series Guides, News, & Discus] VampiruX:
Finally, I just tried, with a 64GB SD card and it is always the same result, fork error 255. It happens immediately after the beginning of backup. I try with only Data enabled.

BTW What is your firmware level ?
[Samsung Galaxy Tab A series Guides, News, & Discus] Talich52:
I have firmware 11 Android T295XXU4CUF7 installed, but with Android 9 bootloader ...

This firmware was released for the region SER, SKZ, as well as BTU, AUT and this is the firmware for the OXM multi-region, where there are many regions ...

There is a warning: if a modem is installed for version 4 of the bootloader, then it will not return to version 3 ... But you can not update the modem in order to completely roll back to 10 android 3 bootloaders ...

P.S. The firmware was also released for other countries, help: https://samfrew.com/model/SM-T295/
[Samsung Galaxy Tab A series Guides, News, & Discus] VampiruX:
Thanks, but too complicated for me. Like you, I am not a developer, just an user (perhaps, advanced, but no more). If it was an IBM mainframe, there I know very well, but not these devices.
[Samsung Galaxy Tab A series Guides, News, & Discus] Talich52:
There is another version of the problem... You use Fix_vendor to disable encryption,the fstab.qcom file is replaced during installation. I suggest reinstalling the firmware or only part of the AP and using a multidisabler that finds and fixes the necessary part of the fstab.qcom file. I found the file on xda and use it ... :)
[Samsung Galaxy Tab A series Guides, News, & Discus] VampiruX:
Good idea, I'll try that tomorrow. Thanks Talich52.
[Samsung Galaxy Tab A series Guides, News, & Discus] VampiruX:
Hi,

Before restarting a full install, I examined the log and the following message, just before the end:

I:cmd: /sbin/exfat-fuse -o big_writes,max_read=131072,max_write=131072 /dev/block/mmcblk1p1 /sdcard1​

__bionic_open_tzdata: couldn't find any tzdata when looking for GMT!​

__bionic_open_tzdata: couldn't find any tzdata when looking for posixrules!​

...done​

Do you have an idea ?

BR
[Samsung Galaxy Tab A series Guides, News, & Discus] Talich52:
I still think that this is an fstab error.qcom, which is prescribed when installing Fix_vendor. Multidisabler does not replace the fstab file.qcom, and makes only the necessary changes.

The philosophy says - " The criterion of truth is practice!(c)"
[Samsung Galaxy Tab A series Guides, News, & Discus] NotTheWalrus:
i'm a new to this thing. Can someone please link me files needed to root this firmware?

T295XX4BUD3 (Running Android 10)
[Samsung Galaxy Tab A series Guides, News, & Discus] VampiruX:
@Talich52: Do I have to install the vendor zip file ?
[Samsung Galaxy Tab A series Guides, News, & Discus] Talich52:
No, instead of Fix_vendor, install the multidisabler laid out above from TWRP.
[Samsung Galaxy Tab A series Guides, News, & Discus] Talich52:
If the full firmware is installed,that is, the BL 4 version loader was used,then there is no solution for rooting :(

P.S. If we were not in a hurry with the update and when updating via ODIN we used the Android 9 bootloader, then you can also root Android 11 ...
[Samsung Galaxy Tab A series Guides, News, & Discus] J.Michael:
Don't play with text color. Use QUOTE or CODE to set-off a snippet.
[Samsung Galaxy Tab A series Guides, News, & Discus] VampiruX:
OK, understood.
[Samsung Galaxy Tab A series Guides, News, & Discus] VampiruX:
It is done. I have not fully tested all, but now I can backup the device with TWRP.

Talich52, your idea was good and your help precious.

Thanks again.
[Samsung Galaxy Tab A series Guides, News, & Discus] Talich52:
Or maybe just reinstalling the firmware and Root-rights helped? .. But I don't want to check something ...;)

The main thing is that now everything works :)

By the way, do you want to upgrade to 11 android? But don't forget to use the BL file for android 9 posted above.
[Samsung Galaxy Tab A series Guides, News, & Discus] VampiruX:
I had still reinstalled from zero twice and didn't see any change.

Android 11 not yet, I like android 9, it is very well for me and the TAB A is already an old device not very efficient.

Thanks for all.
[Samsung Galaxy Tab A series Guides, News, & Discus] tiago156:
@Talich52 attached is my current settings (I think that I have a full firmware installed right?), if I have, what you think that will need to happen to be able to install TWRP on this BL4 version? Samsung release kernel source? Do you think will take too long?

Thanks.
[Samsung Galaxy Tab A series Guides, News, & Discus] Talich52:
The bootloader version can be seen in the Phone Info program from the market. But I suppose it is T295XXU4BUD5, that is, the bootloader is already version 4. The bootloader version cannot be downgraded, and the current bootloader does not allow installing a custom kernel or recovery (TWRP), although the bootloader is unlocked. Earlier question I decided to replace the 10 android bootloader with android 9 while they had version 3. Modifying the bootloader will not work, since it has a digital signature ... Whether there will be a solution at all with rutting the firmware version 4 of the bootloader is unknown to me ...

Here's how I have it:

The modem is installed from the firmware for Korea 10 android ...
[Samsung Galaxy Tab A series Guides, News, & Discus] Harvie Almighty:
Any chance I can root this? Been researching and waiting for updates on root for this device with this firmware.
[Samsung Galaxy Tab A series Guides, News, & Discus] amnher:
So heres no way avoid voiding warranty in unlocking bootloader?
[Samsung Galaxy Tab A series Guides, News, & Discus] J.Michael:
I've seen posts claiming that after relocking the bootloader, the device was showing as "under warranty". If that's true at all, it probably only applies to a very few, specific, devices.

I don't think there's any way to make it look like it's still under warranty while the bootloader is unlocked.
[Samsung Galaxy Tab A series Guides, News, & Discus] amnher:
Hope someone can clear this
[Samsung Galaxy Tab A series Guides, News, & Discus] secretwolf98:
Once you trigger Knox, it voids the warranty once you unlock the bootloader.
[Samsung Galaxy Tab A series Guides, News, & Discus] lifeisfun:
It would be great if someone can make step by step how to from unlocking to root.

I don't care about warranty on cheap device like this.
[Samsung Galaxy Tab A series Guides, News, & Discus] nws990:
Worked for me! Loaded your .tar file in Odin, restarted and it passed Root Checker. Thanks OP!

My t295 was unlocked already too.
[Samsung Galaxy Tab A series Guides, News, & Discus] gcrutchr:
Was able to root my Tab A with newest ROM from Samsung (XXS3ATB2).

Please follow my instructiona and the install instructions from Magisk web page.

Magisk Installation
[Samsung Galaxy Tab A series Guides, News, & Discus] J.Michael:
Do you mean that you did not have to tinker with the patched AP file before downloading it with Odin?

Did you notice if Magisk is now patching differently? (I.e., is Magisk now doing the padding/combining that you did manually?)
[Samsung Galaxy Tab A series Guides, News, & Discus] gcrutchr:
What I meant to say - I will change it - is that after patching as per my instructions, you need to follow the Magisk instructions for flashing.. Put the modified boot.img, recovery.img, vbmeta.img in the original AP*.tar file. See the following web page:

Magisk Installation
[Samsung Galaxy Tab A series Guides, News, & Discus] iwearthebelt:
I just ordered the T295, should be here in a few days. Is the rooting method still working? Also, has anyone heard anything about Twrp being worked on for this device? Any info would be great, thanks!
[Samsung Galaxy Tab A series Guides, News, & Discus] gcrutchr:
Rooting is still working with the newest ROM.

No one is working on a TWRP. Kernel source needs to be released by Samsung before work on TWRP can proceed.
[Samsung Galaxy Tab A series Guides, News, & Discus] LuLarsen:
Would you mind sharing the patched .tar file that you've made for XXS3ATB2, please?
[Samsung Galaxy Tab A series Guides, News, & Discus] gcrutchr:
Here is the magisk patched tar file:

Migisk Patched Tar File
[Samsung Galaxy Tab A series Guides, News, & Discus] iwearthebelt:
Thanks for the info
[Samsung Galaxy Tab A series Guides, News, & Discus] gcrutchr:
Kernel source has been released but for a previous version of the ROM (T295XXU1ASF7).

Current ROM version is XXS3ATB2.
[Samsung Galaxy Tab A series Guides, News, & Discus] Nurhelmi:
Sir,,why vbmeta fail when i flash in odin,,??
[Samsung Galaxy Tab A series Guides, News, & Discus] elliwigy:
cuz u need to disable avb and verity in source build or use a zip that disables it
[Samsung Galaxy Tab A series Guides, News, & Discus] Nurhelmi:
Sir,,Where can i disable avb and verity,,??sorry i newbie about this...?
[Samsung Galaxy Tab A series Guides, News, & Discus] gcrutchr:
When you use Magisk Manager to root, you need to include three files: boot.img, recovery.img and vbmeta.img.
[Samsung Galaxy Tab A series Guides, News, & Discus] J.Michael:
I have gotten "SECURE CHECK FAIL: vbmeta", on the tablet, every time I use Odin with non-stock firmware. In particular, I get it when I flash a tar of boot, recovery, and vbmeta, patched with Magisk, further patched according to [MENTION=1826556]gcrutchr[/MENTION]'s instructions. Odin seems happy. If I reboot enough times, struggling to press the buttons to get half way to recovery (hold the buttons for recovery, but let go of the buttons at the right time, so Magisk takes over, instead of Magisk letting it go all the way to recovery) then I finally have Magisk.

The first time I booted after using Odin, it took a long time to boot. After I got through setting up, I had to install Magisk (which is really Magisk Manager; the app on the tablet is Magisk Manager, Magisk is embedded in the recovery partition). The app said Magisk was not installed. After a lot of reboots trying to hit that magic spot on the way to recovery, there is that wonderful moment when I run the Magisk app and it says it needs to do something special.

I don't think you can disable AVB and dm-verity. I think you were being told that you would need to build a new system, with those disabled, to do something else you asked about -- I don't think you were being advised to do that, I think you were being told that there was no way that you could do that.
[Samsung Galaxy Tab A series Guides, News, & Discus] Talich52:
Bootloader Version: T295XXU4BUD3, that is, already version 4. The bootloader version cannot be downgraded, so the known method of rooting does not work when the 10 android version 3 bootloader was changed to the android 9 bootloader of the same version 3 ...

Whether there will be a solution, I do not know.

At the same time, I have firmware 11 android and Root-rights, as well as TWRP, since I did not update the bootloader and left from android 9, the screen above ...
[Samsung Galaxy Tab A series Guides, News, & Discus] sh770:
There is a way to do that root
[Samsung Galaxy Tab A series Guides, News, & Discus] gcrutchr:
You are on bootloader 'U4'. You cannot root. Samsung has signed kernel/recovery preventing rooting. Also, you cannot downgrade to 'U3'.
[Samsung Galaxy Tab A series Guides, News, & Discus] sh770:
ok tenx
[Samsung Galaxy Tab A series Guides, News, & Discus] Tianhe:
Ok, its been some time since i last played with my SM-T295 and now i am thinking of updating it. Just need @Talich52 , @gcrutchr , @J.Michael or anybody else to help me out so that i dont mess it up !

* First my current status:

Device: SM-T295

Bootloader: Unlocked and Rooted with TWRP and + Magisk 23.0

CSC: INS

BL VersionL T295XXS3ATB2

CSC: T295ODM3ATC1

Android Version: P-9

* I have already downloaded the latest update (R-11) through Frija - T295XXU4CUF7/T295ODM4CUF8 (INS)

## Now, i know that i need to keep BL version at 3 for root rights. My questions are:

1) Can i replace the BL file (.tar) in R-11 firmware by simply unpacking and repacking the .RAR or it requires linux for .lz4?

2) From which specific firmware should i extract the BL Version 3 file to be used as replacement?

3) Is there any specific Odin version which works best for flashing or should i just use the latest v3.14.1?

3) From what i gather, patching files is no longer required to get root. But i think my preinstalled TWRP will be wiped during update through Odin so i should flash TWRP again ? Will reflashing TWRP also require formatting data again to read storage files?

4) Do i need to flash specific vendor_fix zip for R-11 or can i simply flash multidisabler-samsung-2.7_test zip ?
[Samsung Galaxy Tab A series Guides, News, & Discus] gcrutchr:
1: Use the attached BL

2. See #1

3. Use attached TWRP & disabler...yes formatinfgis required - SAVE YOUR DATA

4. the attached disabler will fix everything

See this link for install instructions:

https://xdaforums.com/t/twrp-root-wetamod-for-sm-t295-tab-a-8-0-2019-updated-25-july-2021.4250193/
[Samsung Galaxy Tab A series Guides, News, & Discus] Tianhe:
Thank you for the files and the pointers, I will do the update ASAP.
[Samsung Galaxy Tab A series Guides, News, & Discus] Talich52:
You can use alternative versions of TWRP and multidisabler:

3)about the data, I always update or change the firmware with the data saved :) Conditions: after the firmware, do not allow the device to reboot into the system. Specifically, after filling the firmware, we look at how the device enters the normal recovery mode and exits it with a reboot,while at first there will be a warning screen about the unlocked bootloader.We press any volume button, select Recovery in the menu and briefly press the Power button,get into the firmware mode, flash the TWRP file,enter it and install the multidisabler to disable encryption.Installing Magisk.zip and load into the system... Everything, the device is rooted,and the data is intact ;)
[Samsung Galaxy Tab A series Guides, News, & Discus] Tianhe:
Thank you for the updated files. I normally follow the same procedure to keep data intact after updating FW. However, in this case, I tried flashing TWRP after updating FW (without rebooting to system) but Odin was stuck on setup connection and tablet shows some error (not vbmeta error, it is something else). Later, if you reboot to system, android cannot load OS due to data corruption (There is also something about not being able to set EN-US language / locale)

Anyway, I had already backed up my data so did fresh install and then flashed TWRP-Multidisabler-Magisk. Tablet boots up nice and TWRP backup also works perfectly (not tried restore backup)

N.B.- The most irritating part about Samsung is that you must have cellular connectivity after first boot to allow the device to be registered on Samsung servers. Otherwise, it will show KG status: Prenormal in download mode.

OT UPDATE:

1) In case you feel the compulsive need to debloat the device - i used the "Debloat Samsung Android via ADB" list by "khlam" on github. Works like a charm with no crashes.

2) For using Viper4Android - i installed the V4A A11 apk provided by @RyanCr7 in his thread. Note that I did not have to install any other modules or disable anything (maybe because I had already debloated). Also SELinux is enforcing.

https://xdaforums.com/t/app-fix-100-working-viper4android-for-android-11-devices.4213647/
[Samsung Galaxy Tab A series Guides, News, & Discus] gcrutchr:
Thanks for the updated TWRP
[Samsung Galaxy Tab A series Guides, News, & Discus] dragth:
I am currently on "T295XXU3BUA5_OS10" -- unrooted.

I have the files for "T295XXS4CUG4_OS11" and wanted to upgrade and root by TWRP.

During upgrade, which file do I put in BL slot?

1. BL_T295XXS3ATB2_CL17034026_QB29519559_REV00_user_low_ship_MULTI_CERT.tar.md5

2. BL_T295XXU4CUF7_OS9.tar

3. or compile a new BL_T295XXS4CUG4_OS9.tar

Thanks.
[Samsung Galaxy Tab A series Guides, News, & Discus] Talich52:
This option is 2. BL_T295XXU4CUF7_OS9.tar in no case. Then do not roll back the bootloader and you can forget about Root rights.

You can use this option 1. BL_T295XXS3ATB2_CL17034026_QB29519559_REV00_user_low_ship_MULTI_CERT.tar.md5, but it's better to do BL_T295XXS4CUG4_OS9.tar

I am engaged in this issue ...

Here is the required file in the zip archive:
[Samsung Galaxy Tab A series Guides, News, & Discus] dragth:
Many thanks for the recompiled BL file --upgrading done!

Next step will try twrp-3.5 + magisk --for rooting rights.
[Samsung Galaxy Tab A series Guides, News, & Discus] Talich52:
If you plan to use TWRP, then you need to disable encryption. To do this, install multidisabler and make format data-yes (no wipe data). Well, then install Magisk.zip for rooting.
[Samsung Galaxy Tab A series Guides, News, & Discus] dragth:
Understood... thanks again!

I already have "multidisabler" onhand instead "fix_vendor".

Problem is howto keep appDATA before formatDATA=yes?
[Samsung Galaxy Tab A series Guides, News, & Discus] Talich52:
I recommend making a backup using the Samsung Smart Switch Mobile program to a memory card, then restore almost all applications, but some of them without data. But this is the best without Root rights.
[Samsung Galaxy Tab A series Guides, News, & Discus] dragth:
Ok... will use Samsung Smart Switch Mobile.
[Samsung Galaxy Tab A series Guides, News, & Discus] dragth:
Is there solution for "KG prenormal" for OS11?

Status:

-- Bootloader_T295XXS3ATB2

-- PDA_T295XXS4CUG4

-- OEM unlock missing in developer options

Have spent a whole day reading/trying w/out success.

Many thanks.
[Samsung Galaxy Tab A series Guides, News, & Discus] Talich52:
Flash the stock firmware ... Wait 5 minutes, you can check for an update to speed up the connection with the Samsung server.

P.S. Bootloader, that is, do not flash the BL file, leave the current one, otherwise you will not get Root rights with 4 bootloader
[Samsung Galaxy Tab A series Guides, News, & Discus] dragth:
I tried again today, fresh install -->setup -->connect server and also the 7-days backdated trick --KG still prenormal.

Guess I have to wait 7-days and hopefully oem unlock reappear.
[Samsung Galaxy Tab A series Guides, News, & Discus] Talich52:
It is advisable to change the region and install the firmware where the device did not have the KG Status: Prenormal line or there was Checking, then the blocking will be removed faster. I was removed immediately after installing the stock firmware ...
[Samsung Galaxy Tab A series Guides, News, & Discus] dragth:
I can flash factory installed OS10 (SM-T295XXU3BUA5_Thailand) with Odin pass message but it wont boot (looping).

I can boot both OS10 (SM-T295XXU4BUD3_Vietnam) and OS11 (SM-T295XXU4CUF8_Mexico) --with modded BL_OS9 --but "oem unlock" blocking still there...

I think user @Viggen66 is also having this problem.
[Samsung Galaxy Tab A series Guides, News, & Discus] Talich52:
The current version of the modem is 4 (Baseband). If you install the full firmware with 3 bootloader, the device will not boot due to the downgrade of the modem version ...

If you flash the modem version 4, then the device will boot. Thus, a complete rollback cannot be done ...
[Samsung Galaxy Tab A series Guides, News, & Discus] Talich52:
I recommend that you reset the data from the settings after flashing. It often helps ...
[Samsung Galaxy Tab A series Guides, News, & Discus] dragth:
I give up!!

Will be resting for a while...
[Samsung Galaxy Tab A series Guides, News, & Discus] Tianhe:
Try using a SIM Card with cellular data while booting the device. After the device registers with Samsung servers the KG prenormal state will be gone
[Samsung Galaxy Tab A series Guides, News, & Discus] dragth:
Thanks, already tried that (cellular connection trick) too before requesting help here.

I have read a few users with these 2021-produced device (myself included) having same KG blocking issue (aka anti-theft protection) and so the data connectivity to server seems logical to me for T295.

?? Maybe Y2021 devices have stricter protocols...

Next, I will reinstall latest firmware according to my CSC, insert SIM and wait out the 7-days period and hope...
[Samsung Galaxy Tab A series Guides, News, & Discus] erSSe:
Hello, has anybody a compiled or can compile an OS9 BL for T295XXU4CUF8 ?
[Samsung Galaxy Tab A series Guides, News, & Discus] Talich52:
Here you go :)

The modification consists in replacing the aboot & vaultkeeper files with the files from the BL part of the 9 android.

Unpack the zip archive to tar before use.
[Samsung Galaxy Tab A series Guides, News, & Discus] erSSe:
Thank you so much buddy for the fast reply. This week will give a try. One of them is on BL 4 already. Not sure if the downgrade going to work.
[Samsung Galaxy Tab A series Guides, News, & Discus] Talich52:
No, if the bootloader is already version 4, then it cannot be downgraded to version 3 :(
[Samsung Galaxy Tab A series Guides, News, & Discus] dragth:
Just to update that after 260hrs (no reboot) --the kg status is still prenormal.

Firmware tested was OS11 (SM-T295XXS4CUG4_OLM).
[Samsung Galaxy Tab A series Guides, News, & Discus] Talich52:
These are wrong actions. To change the Prenormal status, you need to connect to the Samsung server, for this you should request a regular update and reboot the device. You cannot reset the data, otherwise the time counter will be reset ...
[Samsung Galaxy Tab A series Guides, News, & Discus] dragth:
I will try to update... thanks.
[Samsung Galaxy Tab A series Guides, News, & Discus] Talich52:
The issue is not about the update, it is better to disable the update. When checking for an available update, the device connects to the Samsung server and this is what is important :)

P.S. If after 7 days there is no result, then you can reset the data. At the first request for updates, the device is registered on the Samsung server and the counter starts counting 7 days, sometimes up to 10 ...

There is also a way to change the date 7 days ago with checking for updates and returning the current date, also checking for updates ...
[Samsung Galaxy Tab A series Guides, News, & Discus] dragth:
I downgraded OS (11 to 10).

Changed CSC (OLM to OXM).

Now I have "update available" from Samsung server.

OEM unlock still missing...
[Samsung Galaxy Tab A series Guides, News, & Discus] Leugadong:
hi I need help please...

I followed all the instructions, got root with TWRP 3.4.0.1+vbmeta t295 and magisk v.20.4 installed on my samsung T295XXS3ATB2.

But i have no idea why my wifi and bluetooth can't turn on. Am I did something bad, i cant figured it out. please help.

@Talich52 @gcrutchr @Tianhe

tried to flash back stock firmware with odin, but no luck. wifi still won't turn on.

Flashed with

Odin 3.14

TWRP 3.4.01

Multi Disabler 3.1
[Samsung Galaxy Tab A series Guides, News, & Discus] Talich52:
Flash the original stock firmware with the CSC part, not HOME_CSC, that is, with data reset. Wi-Fi should work. If the rooting was a file installation, but for a different firmware, then Wi-Fi will not work.Therefore, it is better to root through TWRP.
[Samsung Galaxy Tab A series Guides, News, & Discus] Leugadong:
Yes, i did tried flash the original stock firmware

put on BL, AP, CP and CSC and its passed without an error, just the wifi and bluetooth not working now.

Im sory what does this mean "If the rooting was a file installation, but for a different firmware" ?

I just followed all the instructions, or maybe I did something else on this part

13. You will then format (NOT WIPE) data. Answer yes to the format prompt

that caused this error.
[Samsung Galaxy Tab A series Guides, News, & Discus] Leugadong:
@Talich52 I just mentioned that you said with data reset. Does that mean I have to push this Reset button?

Because I just push Start button all the times im flashing.