yashsingh1/xdaforums huggingface dataset:
[Galaxy Tab S2 Android Development] lpedia:
With most custom ROMs you will have that sort of problem, particularly with apps for banking and pay, but not only with that type. The apps check for and detect that the ROM isn't stock Android, and treat that as an insurmountable security risk. Some of the things they detect include: that the device's bootloader is unlocked; that the ROM hasn't been signed by a trusted certificate; that the ROM is rooted; that SE Linux is disabled; that the device doesn't pass Google's SafetyNet check.

If you really need to use those apps on your device, you have to take steps to hide whatever it's objecting to. This generally involves rooting the device with Magisk and configuring that to conceal the device's condition. I can't give step by step instructions for this. See the Magisk section of XDA https://xdaforums.com/f/magisk.5903/ and [Discussion] Magisk: The Age of Zygisk (a discussion and help thread for newer versions of Magisk).
[Galaxy Tab S2 Android Development] keyap:
I experienced similar running this version of Los 18.1 on my T710 and managed to sort without the need to root or hide anything

I've just tried installing BT Email on my T710 with LoS 18.1 and it opened OK

What I did is in post #80 of the thread above I linked to

As Ipedia said, there's a few different things that could cause this, but it may be worth a try?
[Galaxy Tab S2 Android Development] bowtie81:
anything happening for the SM-T815? Can't find newer roms than this and I would need this tab as a mobile office in the car with GPS playing a key role as a car navigator, but GPS is not working at all with this release, is there any way to get it working without another rom?​
[Galaxy Tab S2 Android Development] Hagar76:
I've just wiped my T815Y and loaded gts210ltexx. it's working pretty good, except no mobile data at all.

Have I done something wrong perhaps?
[Galaxy Tab S2 Android Development] metterschling:
No. See various similar posts above in this thread. RIL (mobile data, telephony) is not working for the current ROMs published in this thread.
[Galaxy Tab S2 Android Development] Hagar76:
I did do a search for 'Mobile data' but found nothing. What was the last stable release that the data worked?
[Galaxy Tab S2 Android Development] metterschling:
Just one page back, Post #2463 for example.

There has never been a stable 18.1 release of these ROMs with working RIL. There might have been a 17.1 release with that functionality. I suggest, you read pages back in this thread at around September 2021 to verify and find someone who might still have a copy of the 17.1 build.
[Galaxy Tab S2 Android Development] parhit:
Hi.

Thanks for this ROM.

Unfortunately, I don't have the options listed for wipe (full wipe without external microsd card with Home PC access):

reboot the system now

apply the update from ADB

apply update from external storage

apply update from cache

wipe data/factory reset > one option: deleting all user data

wipe cache partition

reboot with boot loader

power off

display recovery logs

What should I choose to install the ROM?

Thanks for the help ;)

Kind regards from France
[Galaxy Tab S2 Android Development] parhit:
Hello.

I tried several things to install the LineageOS 18.1 version on my Samsung Tab S2 tablet before coming to you.

1/ Installation for SM-T715 from the computer

I first moved the files lineage-18.1-20211103-UNOFFICIAL-gts28ltexx.zip and open_gapps-x86_64-11.0-pico-20220503.zip to the root of the tablet's storage space.

Then reboot into recovery mode.

I don't have all the options in Wipe (see picture), so I did the two possible ones (data/factory reset then cache partition).

View attachment 5914387

Then, as I can't find "Install Rom and GApps", I tried via adb sideload to install the .zip Lineage.

After finalizing the transfer, I have a reboot that sends me to a first installation of applications (it seems to me that they are the default ones like the app L'équipe etc) and then on the Android configuration.

2/ Installation from an SD card

I tried the operation again by adding the two zipped files on an SD card.

I try to install from Update frome external storage, I select lineage-18.1-20211103-UNOFFICIAL-gts28ltexx.zip

View attachment 5914389

But again, after complete installation, the tablet restarts automatically, talks about installing applications and sends me back to the Android configuration.

What am I doing wrong? Thanks for your help.
[Galaxy Tab S2 Android Development] keyap:
That looks like stock recovery... You need to install TWRP recovery then follow the steps in post #1
[Galaxy Tab S2 Android Development] parhit:
Thanks @keyap.

Do you have a link for TWRP adapted to my model SM-T715? ;)
[Galaxy Tab S2 Android Development] keyap:
I don't actually have the tablet so am not sure if there's any variants etc... I think it's probably this one but best to wait for someone else to jump in:

Samsung Galaxy Tab S2 8.0 2015 (LTE)

Disclaimer:Team Win strives to provide a quality product. However, it is your decision to install our software on your device. Team Win takes no ...

twrp.me
[Galaxy Tab S2 Android Development] parhit:
Thanks for the help.

So:

My tab is Samsung Galaxy Tab S2 SM-T715 8,0" LTE

This version of TWRP seems to be correct

What can I do after this?

Someone told me I have to use Heimdall for flashing a Samsung device, it isn't the same as TWRP?
[Galaxy Tab S2 Android Development] keyap:
If flashing stock firmware or installing a custom recovery such as TWRP onto a device which currently has stock firmware / recovery, I use Odin

TWRP is a custom recovery and replaces the stock recovery. Once you have TWRP installed it can then be used to flash things to the device such as LineageOS and Gapps
[Galaxy Tab S2 Android Development] parhit:
Ok thanks.

So TWRP is installed. How can I do to flash the tab?

Do I necessary need Gapps?

In fact, I flashed my cell (Xiaomi) but the tutorial I found was very clear. I need to understand all the steps in order to do it correctly :)
[Galaxy Tab S2 Android Development] pflyaz:
Hello @parhit . May I suggest you take a look at my detailed Upgrade Procedure post from May 27, 2022 on thread https://xdaforums.com/t/unofficial-rom-beta-lineageos-18-1-for-sm-t710-may-8-2023.4430339/page-2 . That thread is for the T710 only. But with the correct ROM for the T715 and the correct TWRP for the T715 all the other instructions are solid.
[Galaxy Tab S2 Android Development] parhit:
Hey @pflyaz thanks for the valuable feedback.

I'll note for the thread, though in the title it does say [T710][T715][T715Y][T810][T815][T815Y] so mine is T715. I'm a bit of a neophyte when it comes to the XDA developers forum.

I took the right ROM and the right version of TWRP.

So, following your tutorial, I'm here: Step 2 - 5 Connect your Tab S2 via USB to your PC, and you should see Added!! in Odin.

When I launch Odin, I get an error message at the bottom left: Error no method specified. I tried to change the USB port, the cable is the official Samsung cable...

View attachment 5915165

When I connect the tablet, I don't see anything else in Odin.

I'm on Linux, so I did an old-fashioned installation (sudo apt install odin) to get by.

View attachment 5915187

Any ideas? Thanks for the help.
[Galaxy Tab S2 Android Development] pflyaz:
Sorry, but I can't help with Linux. I only have Windows and Odin works just fine. Just for clarity, the thread I referred you to is exclusively for T710 and T810 ROMs - this thread covers more devices per its title.
[Galaxy Tab S2 Android Development] lpedia:
@parhit, Odin is a Windows-only Samsung app intended for flashing Samsung stock firmware to Samsung devices.

I have no idea what the 'odin' app you got with sudo apt install odin is, but your screenshot certainly doesn't look anything like Samsung's Odin. What does the "Help" item in that window tell you about it?

Most Android devices can be put into fastboot mode, and the fastboot tool that comes with Google's platform-tools package can then flash TWRP to the recovery partition of the device.

However, Samsung devices don't have a fastboot mode, so you need a tool that can flash recovery via download mode. Suitable tools are Odin and heimdall. Odin is only available for Windows, but heimdall has Windows, linux, and MacOS versions.

To install heimdall on your linux PC:

sudo apt install heimdall-flash

The app package is 'heimdall-flash', but the app command is 'heimdall'.

Put the device into download mode, then follow the instructions starting from step 6 of https://mdmower.github.io/lineage_wiki/gts210vewifi_install.html (this is for a different Samsung device, but the steps are the same). Take note of the green "Tip" and the warning to reboot to recovery mode immediately after flashing TWRP.
[Galaxy Tab S2 Android Development] parhit:
Thanks @pflyaz for the help and for the clarification ;)
[Galaxy Tab S2 Android Development] parhit:
@lpedia I found this here in another topic but I run to install it through a command line, and the Odin package is in fact in attachment...

But in absolute terms, for the sake of keeping up, I'll pass on Heimdall.

"ODIN user interface

Version 2.0.4

(w) 2004-2019 by Thies Jochimsen

Compiled with the following plugins:

odinseq_standalone

Configuration:

using_gcc gui:)5) standalone dl posix_threads LAPACK(lapack thread-safe) libz gsl nifti vtk dicom png ismrmrd"

I search for it: it's a framework to develop, simulate and run magnetic resonance sequences :)

MY BAD!

So, Heimdall yet installed, I start from step 6 and do:

heimdall flash --RECOVERY twrp-3.7.0_9-0-gts28ltexx.img --no-reboot

Then:

Power down by holding down VolDown+VolUp+Power.

IMMEDIATELY the screen goes blank, hold down Home+VolUp+Power.

Keep holding down until you see the TWRP home page.

But I don't boot on recovery mode. Whether I press it for a few seconds or two minutes, it stays frozen on the Samsung logo and then the screen goes black and the tablet shuts down.

I tried to change the name of the file .img:

heimdall flash --RECOVERY recovery.img --no-reboot

But it's the same. My version of TWRP is correct?! What am I doing wrong again? Grr!
[Galaxy Tab S2 Android Development] lpedia:
The only thing I can think of is that the battery doesn't have enough charge. If the battery's at a very low level but not completely drained, the tab can do as you've described above: show the Samsung splash page for a bit, then just shut down instead of booting.

The name of the file doesn't matter.
[Galaxy Tab S2 Android Development] parhit:
Arff...

So 80% of battery... I will try again...
[Galaxy Tab S2 Android Development] lpedia:
If you haven't got it working yet, try this:

If the device has rebooted to system after the last time you flashed TWRP, the stock recovery will have replaced TWRP, so go back to Download mode and flash TWRP again.

Now shut the tab down: connect it to the charger, then hold Volume Down + Power until the device shuts down.

Note: If the device is on the charger when you do this, it's forced to

shut down.

If the device is not on the charger when you do it, it's forced to

restart

. In this case, it is easier if you shut the device down, so you have plenty of time to get your fingers onto the boot-to-recovery sequence.

Now reboot to recovery: press and hold the Home and Volume Up buttons

before

also pressing and holding Power. Note: This makes sure you aren't accidentally pressing Power before the other two. The Power button is what activates any of these sequences, so if it's pressed before the other buttons, the sequence won't be correct.

Keep holding all three buttons until the Samsung splash page comes up, then let go. TWRP should come up after a few seconds.
[Galaxy Tab S2 Android Development] metterschling:
Try twrp-3.6.1_9-0-gts28ltexx.img. Based on my experience, newer versions for the T715 are either buggy or not installable at all, so I'm sticking to that one.

BTW: If you require mobile data and telephony calls, I'd suggest to try this rom rather than the T715 one in this thread. The ROMs in this thread have got broken RIL (Radio Interface Layer), thus mobile data or telephony won't work.
[Galaxy Tab S2 Android Development] m32:
@parhit

failed to verify whole file signature - is yours tablet rooted ?
[Galaxy Tab S2 Android Development] cobalt100b:
Hi there,

I'm facing massive battery drain when not using my SM-T715. About 10% in 3h and the AccuBattery App shows me that the tablet does never enter deep sleep during screen off times.

Does anybody have the same problem and is there any solution?
[Galaxy Tab S2 Android Development] metterschling:
You might try this ROM alternatively. I'm getting battery lifetimes of up to 5 days - without gapps and SIM card though, light usage. You have to clean flash & format data though when coming from ripees variant.
[Galaxy Tab S2 Android Development] parhit:
I don't know...
[Galaxy Tab S2 Android Development] parhit:
@metterschling

Hello.

I've taken the time to get back into it.

I do the flash with the code $heimdall flash --RECOVERY twrp-3.7.0_9-0-gts28ltexx.img --no-reboot then I do Volume down + Power.

I press Volume up + Home and finally Power to switch to TWRP but the screen stays on the Samsung slash screen for a long time (a few twenty seconds). Then it reboots and, after the splash screen, sends me to Android.

I've tried with twrp-3.6.1_9-0-gts28ltexx.img but same problem. I let go of the buttons after seeing the splash screen...

Any ideas?
[Galaxy Tab S2 Android Development] metterschling:
I'd say keep pressing the buttons until TWRP appears.

Also, immediately switch the buttons when you recognise that the tablet gets out of bootliader mode.

I remember having to try a couple of times for the right timing.

Note that I used to use ODIN on top of a Windows-to-go USB boot device, so can't tell if everything works with Heimdall as well.
[Galaxy Tab S2 Android Development] parhit:
I tried again, waiting for 5, 10, 15, 30s or even several minutes. In the end, it always ends up restarting...

So I'm wondering if it's the flashing that's screwing up (Heimdall), I don't have any Windows handy to try Odin... I'm already having a bit of trouble following the long descriptions in English (I'm French), so it's becoming difficult to make progress despite my limited technical skills.

In any case, thanks to all those who are trying to help me.
[Galaxy Tab S2 Android Development] m32:
my t719 is rooted and in bootloader mode i have a completely different picture (below)

warranty void: 0x01
[Galaxy Tab S2 Android Development] metterschling:
Well spotted!

@parhit "warranty void: 0" indicates that your tablet is not rooted which is required as a prerequisite for TWRP installation.

Try to follow a rooting guide like at https://xdaforums.com/t/guide-how-to-root-tab-s2-and-more.3205019/

You can download a Windows trial ISO and flash it using the Rufus tool to a bootable USB stick. Search for "Windows to go".

You'll most most likely need Odin/Windows for the cf-autoroot, if anyone known if that could also be done with Heimdall, I'd be happy to get corrected.
[Galaxy Tab S2 Android Development] m32:
heimdall works on ubuntu without problems:

#!/bin/bash

sudo apt install heimdall-flash heimdall-flash-frontend

RR=twrp-3.6.2_9-0-gts28velte.img

heimdall flash --RECOVERY $RR
[Galaxy Tab S2 Android Development] metterschling:
Well, that is the step to flash TWRP. I wasn't doubting that this works with Heimdall, but what about the initial rooting via cf-autoroot?
[Galaxy Tab S2 Android Development] m32:
Sure, initially I used cf-autoroot with odin (ages ago:))) like in:

Downloads To Root Galaxy Tab S2 On Nougat 7.0 Using CF-Auto-Root? (All Models) - SamsungSFour.Com

Downloads To Root Samsung Galaxy Tab S2 SM-T710 Downloads To Root Samsung Galaxy Tab S2 8.0 SM-T713 Downloads To Root Samsung Galaxy Tab S2 8.0 4G SM-T715 Downloads To Root Samsung Galaxy Tab S2 8.0 SM-T715N0 Downloads To Root Samsung Galaxy Tab S2 8.0 LTE SM-T719 Downloads To Root Samsung...

www.samsungsfour.com
[Galaxy Tab S2 Android Development] Sotogun:
Hello, i have a t815. Im reading accross the forum and i want to ask what is the current status for the lte/phone functionality? Is it worth it on the t815?
[Galaxy Tab S2 Android Development] parhit:
Hi there.

@m32 & @metterschling is there a way to use Heimdall instead of Odin? I'm on Parrot Sec (Linux) and don't have a Windows computer around me...

I can follow the instructions using heimdall as here (in French) https://doc.ubuntu-fr.org/heimdall#rooter_le_telephone ? :) But for the tutorial for rooting, it's all about Windows https://nerdschalk.com/samsung-galaxy-tab-s2-root-sm-t810-sm-t710-sm-t715/

PS: to make sure I understand, please correct me (without whipping) if I'm wrong:

- root: unlock the tablet

- flash: install a custom ROM
[Galaxy Tab S2 Android Development] m32:
@parhit If the upload will succeed you will have a new recovery, if it is rejected nothing will happen.

copy of the partitions (modem, ... ) - if you flash with heimdall, I don't know if you will be able to do it.

Either way, the decision is yours.
[Galaxy Tab S2 Android Development] parhit:
Thanka @m32 for the support, I don't want to brick the tablet...

Here is what I did:

Recover the autoroot archive and unzip it

In download mode, sudo heimdall flash --RECOVERY recovery.img --CACHE cache.img

Reboot and install SuperSU

Root is OK, I have Know warranty void: 1 (instead of 0 before)

In download mode, $heimdall flash --RECOVERY twrp-3.6.1_9-0-gts28ltexx.img --no-reboot

I try to restart on TWRP with Vol+ + Home + Power but if I let go of the Android home screen or press and hold for a long time, the splash screen appears, but then the screen goes black and the tablet shuts down.

Have I missed another episode?
[Galaxy Tab S2 Android Development] m32:
@parhit

try to enter recovery a few times, if that fails, reload recovery and try again.

if nothing helps, try another recovery, for me works twrp-3.6.2_9-0-gts28velte (sm-t719)

gts28ltexx ? it is for exynos based device, what do you have on the sticker on the back of the tablet ?

maybe you chose recovery not for your device
[Galaxy Tab S2 Android Development] parhit:
OMG you're right @m32 <3

I changed TWRP files according to the tutorials I read, without mastering the trick.

I went back to the right thread with a TWRP adapted to my tablet (Samsung Galaxy Tab S2 SM-T715 8,0" LTE, Android 5.0.2 Lollipop) and it worked. I was finally able to boot into recovery mode <3

However, installing the ROM lineage-18.1-20230514-UNOFFICIAL-gts28ltexx doesn't work

View attachment 5936819

I'm going to try using the other version lineage-18.1-20230618-UNOFFICIAL-gts28ltexx https://xdaforums.com/t/unofficial-...or-sm-t715-june-18-2023.4509345/post-87618765 as it seems that I haven't choose the right one...
[Galaxy Tab S2 Android Development] parhit:
I've tried the lineage-18.1-20230618-UNOFFICIAL-gts28ltexx version but I get another error that I can't read in full (part of the message is truncated):

E3004: This package is for device: gts281te, gts281texx; this device is [...]
Updater process ended with error: 1
Error installer zip file '/external_sd/lineage-18.1-20230618-UNOFFICIAL-gts28ltexx.zip

And when I tried with the Gapps open_gapps-x86_64-11.0-pico-20220503.zip I must have got something wrong again, the error message is quite explicit:

Error 64: wrong architecture to se-up Open GApps" pre-bundled busybox [...]

So I deduce that this version is not suitable for my tablet... I will try to find what best fits to my needs with this great website https://opengapps.org/ and test if nano or pico can help. I don't know if my tab is 32 or 64bits.

Can anyone tell me which ROM I should use? I was careful to use a ROM adapted to the SM-T715 model, but there's a subtlety I don't understand?

Another thing is that I can't turn it off. Since TWRP, when I do Reboot then Shutdown, the tablet reboots and freezes on the splash screen without stopping... I don't know how to force it to stop...
[Galaxy Tab S2 Android Development] metterschling:
Your screenshot shows that you are trying to install gapps for x86_64. x86_64 is the wrong processor architecture. The Samsung Exynos processor belongs to the ARM CPU family.

Please try without gapps first.

If you then choose to install gapps, select the ARM variant.
[Galaxy Tab S2 Android Development] metterschling:
As I wrote above, my ROM (please use the other thread to discuss that one) is not the issue here, you were using the wrong gapps. Please do a full wipe including format data, then just flash the ROM and boot to it for verification.
[Galaxy Tab S2 Android Development] scozaio3:
Good am, need help. When i try to flash smt815y rom, it says error. How to fix? Thanks
[Galaxy Tab S2 Android Development] parhit:
Thanks @metterschling for this information. I will try with the ARM version but I don't even know if I need them...
[Galaxy Tab S2 Android Development] parhit:
@metterschling I continue on your thread, thanks.
[Galaxy Tab S2 Android Development] jastellar:
Hi,

I have the choice to buy either a Tab S2 SM-T715 or a Tab S2 SM-T719.

Any recommendations regarding these two models and my intention to install Lineage OS on them?

Thank you for your help.
[Galaxy Tab S2 Android Development] coolman_ig:
Will this ever get T813 support? If not, why? (I just want to know lol)
[Galaxy Tab S2 Android Development] jastellar:
https://xdaforums.com/t/unofficial-...r-sm-t813-june-23-2023.4600493/#post-88703109
[Galaxy Tab S2 Android Development] UweRammelt:
Is there a way to get rid of the lock screen, i.e. go directly to the PIN entry?
[Galaxy Tab S2 Android Development] CreiX:
Hello there.

I just tried those steps with my Samsung Tab S2.

But i am doing something wrong.

I put the LOS and the GApps as ZIPs on the SD-Card.

But in the recovery mode i can only do a Wipe cache partition . And do Wipe Data / factory reset.

So I did the Wipe Cache Partition.

Than wipe Data.

Than I choosed "apply update from SD" and tied to install the LOS - with failled always. The image is findable, can be opened and the verifying tells "failed to verify the signature"

What Step am I missing?

Samsung SM-T810 gts210wifi

Did I missed a step?
[Galaxy Tab S2 Android Development] lpedia:
The instructions in post 1 assume that the custom recovery is TWRP.

It sounds like yours is LineageOS Recovery, which has quite a different interface (hence no "Advanced" wipe options).

But it should still work to install this ROM.

Lineage Recovery will always report "Signature verification failed" if a ROM or addon hasn't been signed with an official key, but it isn't a fatal error. You should have the option to Continue regardless.

Unofficial custom ROMs can be expected to trigger this warning, because they are not usually signed. Just click Continue.
[Galaxy Tab S2 Android Development] CreiX:
Ur were right, I was not understanding it so well.

But I am also not able to flash any TWRP-Versions ( 3.5.x - 3.7.x ) to the device with ODIN :/
[Galaxy Tab S2 Android Development] shalannn:
htc phone need from you to go to download mod first to can install twrp file

steps

1

adb reboot download

2

fastboot flash recovery twrp-1.1.1._ocn.img

3

make sure the img file you go to install on your htc phone on download mod
[Galaxy Tab S2 Android Development] bmwdroid:
?? This is a Samsung galaxy Tab thread.

Fastboot doesn't work on Samsungs
[Galaxy Tab S2 Android Development] demizone:
Hello, where is the version of T819?
[Galaxy Tab S2 Android Development] bmwdroid:
Only LOS 17 afaik.

No 11 yet so just build it yourself.
[Galaxy Tab S2 Android Development] Jam1eG:
Did anyone have this at all please?
[Galaxy Tab S2 Android Development] dkadds2:
Just checking if these two bugs are still in place for T715? These seem to be killing tablet as video conferencing solution.
[Galaxy Tab S2 Android Development] lpedia:
Try this thread: https://xdaforums.com/t/unofficial-rom-beta-lineageos-18-1-for-sm-t715-october-1-2023.4509345/
[Galaxy Tab S2 Android Development] dkadds2:
Amazin' Thank you very much!
[Galaxy Tab S2 Android Development] MrBrause:
We are working on 18.1 for T815 in https://xdaforums.com/t/black-scree...ineageos-18-1-for-t815-galaxy-tab-s2.4637338/
[Galaxy Tab S2 Android Development] tripLr:
Check my signature