yashsingh1/xdaforums huggingface dataset:
[Galaxy Tab S2 Android Development] lpedia:
You don't have the correct version of the bootloader on your device, and this could certainly make TWRP unable to boot.

Before you attempt to install a custom ROM, the device must have the latest version of stock Android that the manufacturer provided for that device. This is because installing custom recovery and ROMs doesn't normally replace the bootloader, so the bootloader that's there has to already be compatible with them. If you don't have the right bootloader, TWRP and/or the ROM are certain not to work properly or maybe not work at all.

Each Samsung firmware update for the device updates the bootloader as well as the system, so by installing the latest firmware you will get the right bootloader. You have 5.0.2 (Lollipop), which isn't the latest release for the SM-T810. That was 7.0 (Nougat).

See https://www.sammobile.com/samsung/galaxy-tab-s2/firmware/#SM-T810. You need to install that version on your device.

Once you've done that, install the version of TWRP that @retiredtab recommends in the FAQ in his T810 thread. This is known to work with LineageOS 18.1. As with the bootloader, the version of TWRP you use should be the most recent version known to work with the relevant custom ROM on your device. Older versions might not work with newer ROM versions.
[Galaxy Tab S2 Android Development] HellRaiser9101:
When I install Gapps (ARM, android 11, nano or stock) lineage does not boot just tries to load for about 5 minutes. Any ideas?
[Galaxy Tab S2 Android Development] lpedia:
Which Gapps package did you try, and what version? If the latest version doesn't work, try the previous version - and so on until you find one that does.

I've successfully used NikGapps and BiTGapps on my T710 at different times, and have not had problems with either. I'm currently using the latest version of NikGapps.
[Galaxy Tab S2 Android Development] khadanja:
Flashed to T710 with pico gapps, after connecting to wifi, it says couldn't connect and if I try offline mode it's stuck on Just a sec.. Tried other gapps, nano & mini, with those after flashing, reboots to twrp recovery. Any ideas?
[Galaxy Tab S2 Android Development] shutdown-h_now:
You have to install GApps (preferably the pico variant) right after flashing the ROM and before(!) booting the device for the first time. Otherwise hangs while booting will probably occur.
[Galaxy Tab S2 Android Development] deepthifdo:
@ripee, Andrew or Tom

First of all thank you very much for your greater contribution and to keeping one of the best hardware alive for this long.

Let me introduce myself, I Deepthi have over 35+ years of s/w development experience with strong Java experience from 1996.

I have some understanding about Android and build few test apps while back.

As I am getting more free time since my kids are old enough, I m planning to join LineageOS community to support development.

To start with, I like to locally build https://github.com/LineageOS/android_device_samsung_gts28ltexx.git.

However I am unable to find manifest file for above? Will you be able to point me to the manifest file and/or let me know the steps to build this specific version.

I just upgraded my VM to Ubuntu 22.04, so if you see any known issue, appreciate let know.

Lastly, what s the process of getting ROM, official, I am happy to spend my time and get this device to mainstream official device list (if that is possible)

Looking forward to get your reply.
[Galaxy Tab S2 Android Development] ripee:
Our device sources are under the other link in the OP, universal5433. If you would like a script to automate the setup up of your build environment on Ubuntu 22, see my GitHub: https://github.com/ripee/scripts.

Official support is a waste of time for most devs since Lineage's standards are very high and almost impossible to achieve on old devices such as these tablets.
[Galaxy Tab S2 Android Development] deepthifdo:
@ripee Thank you very much for your quick response, also do you hav avd export for me to use for build purpose?
[Galaxy Tab S2 Android Development] FKzen:
It is not for T815, if I want install it ERROR 1 appears. I'ts for T810 !!!
[Galaxy Tab S2 Android Development] aboulafia1901:
Hello ,

And if you try the link of @ripee ?:unsure: : https://drive.google.com/drive/folders/1m6duIT5ejN11fk20fFfxZwKMQvftJDKL
[Galaxy Tab S2 Android Development] FKzen:
Yes, that is the correct link for t815. I install it but my sim card is not detected, so there is no mobile service. Do you know a working ROM for t815?
[Galaxy Tab S2 Android Development] edufur:
Is there anything about the 813 that makes it not a candidate for this build?
[Galaxy Tab S2 Android Development] lpedia:
Yes. The chipset, CPUs, and GPU of the 2015 and 2016 Galaxy Tab S2s are different. This ROM suits only the 2015 Tab S2 hardware. The 813 is a 2016 Tab S2.

From https://www.gsmarena.com/samsung_galaxy_tab_s2_9_7-7438.php

View attachment 5615361

View attachment 5615357
[Galaxy Tab S2 Android Development] garfieldf:
Other T815 With no ril. Its a great rom, very fast, but for my isnt work. ¿Where i can find the previus version, LOS 17.1 T815 with LTE working fine?

Thaks a lot for all your work
[Galaxy Tab S2 Android Development] headzy:
Any link for 17.1 T715 guys?

As this one glitches graphics in games and tab gets very hot.
[Galaxy Tab S2 Android Development] metterschling:
Sure, mail sent. No experience with games here but apart from fingerprint occasionally not working the 20210825 los 17.1 build is very stable + has got working RIL.
[Galaxy Tab S2 Android Development] some1tech:
thanks man, it worked totally fine without enable the unlock oem option (because it was missing, can't find it on developers mode).. oh anyway, I'am using T710 8.0 flashed from stock rom Nougat 7.0 .. I'm followed your instuctions and succed.. Thanks a ton!! It's greatly helped my problem before hahah... cheerss
[Galaxy Tab S2 Android Development] tsergaki:
Hi, i just try this rom on a t715 gts28ltexx. awesome rom but sim/lte wont work at all. Any idea?
[Galaxy Tab S2 Android Development] sharan565:
can we expect android 12L based lineage os in future.
[Galaxy Tab S2 Android Development] thaichow:
hey , i want to perform a factory reset after some time i have installed this rom will there be any issue or bootloop ?
[Galaxy Tab S2 Android Development] Johnybeas:
I've got a T817T I've read some places that it's the same as T815 can anyone confirm this? is there a different rom for my tablet?
[Galaxy Tab S2 Android Development] bmwdroid:
Bit of searching would have led you to the answer in this! thread.
[Galaxy Tab S2 Android Development] bmwdroid:
Should work but no guarantee given.
[Galaxy Tab S2 Android Development] Johnybeas:
Thanks with so many pages I ended up missing that I guess.

So I had followed the steps for "FULL WIPE (without external microsd card with Home PC access)" in order to do a "clean install" and wiped everything including the backup that was of the factory setup not even thinking, hey it's on the same partition. Now I can only load TWRP and the Samsung boot screen and it doesn't go further. (this was all before I posted in here) I had tried loading the Image from the 815 and It said it was invalid. So I unzipped the main folder and just loaded the zipped folder inside and it went but said it failed to update system E1001 error. I ended up getting an SD card to see if perhaps it was just not liking where it was loading from. Same issue. Then I checked here and saw your post.

@ripee or any of you have a rom that will work for the T817T or know where I can get the factory one back. I already wasn't using the tablet because nothing would update anymore and google play store kept crashing. If it's bricked it's bricked, but I was hoping someone might have some direction. I do see some other threads that have rom's but I'm not sure if there is something different I need to do to not make the situation worse.
[Galaxy Tab S2 Android Development] Johnybeas:
I see you did this with earlier versions of the files. Do you still have them?
[Galaxy Tab S2 Android Development] lpedia:
Stock Samsung firmware for all devices is available from https://www.sammobile.com/firmwares/. You'll need to use Odin to flash it to the device, because TWRP doesn't handle restoring from stock firmware packages.
[Galaxy Tab S2 Android Development] tamjan:
I have a SM-T815 (gts210ltexx). Does anybody know what the obstacle hindering updates is?
[Galaxy Tab S2 Android Development] Sir Thopas:
I mean, it's designed for your variant, right? So it ought to work.
[Galaxy Tab S2 Android Development] tamjan:
I meant that the last build is quite aged now.
[Galaxy Tab S2 Android Development] Kirek50:
After installing the ROM, it does not see my SIM card. Any solutions?
[Galaxy Tab S2 Android Development] entomologisthemant:
Pl give support for T819Y also.
[Galaxy Tab S2 Android Development] bmwdroid:
Sorry, better search somewhere else.

Here are Exynos devices and T819 has Snapdragon.
[Galaxy Tab S2 Android Development] flunkyball:
Since there are contradictory answers on this matter I wanted to ask again before trying out LOS 18.1.

Iam currently running LOS 17.1 in my T815 with LTE working nicely.

Does LTE work in T815 (old variant of S2) with this rom or not ? If not, why is it not mentioned in the "known issue" section ?

Thx for any help on that.
[Galaxy Tab S2 Android Development] bmwdroid:
This is mandatory as no stock recovery will flash a custom ROM.

Samsung Galaxy Tab S2 8.0 2015 (Wi-Fi)

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

Magisk is only necessary if you want to have root (admin) privileges.

The ROM will work without root.

I would recommend to use the pico version of OpenGapps to easier identify problems with Google stuff when installing the in pico not included apps afterwards from playstore.

AND i think that the ROM from @retiredtab has much newer patches included.
[Galaxy Tab S2 Android Development] lpedia:
@filker0 - looking at post#1 in this current thread, I can see that it was assumed a new user would be coming from a different LineageOS (or other custom Android) and would already have TWRP recovery installed.

So you will first need to install TWRP. Use the TWRP version that retiredtab recommends in his T710 thread (the link that @bmwdroid has given above). Once you have TWRP installed, the rest of the installation instructions given in this thread should work.

@bmwdroid - as of late yesterday, the T710 build is up to date with the July 2022 patches. 🙂
[Galaxy Tab S2 Android Development] Sir Thopas:
Currently not working. (Maybe one day it'll be fixed.) So stick with LOS 17.1 if you need LTE right now
[Galaxy Tab S2 Android Development] gerega:
Any chances to get an updated ROM?
[Galaxy Tab S2 Android Development] bmwdroid:
Helpful to name the device. 😉

ROMs for T710 a T810 got it by @retiredtab.

He made even a 19.1 for both.
[Galaxy Tab S2 Android Development] Chiang kiddo:
Thanks!!! It works on SM-T715C. Thanks
[Galaxy Tab S2 Android Development] SteveWe:
Hi out there,

i have an sm-t810 and used it for long years with LOS 14. Now i want to try this version (lineage-18.1-20211103-UNOFFICIAL-gts210wifi) on my tab and followed the instructions at the beginning, even with the newest TWRP (3.6....).

i can install two different versions of LOS 14 without any problems but installing LOS 18 always stops at approx. 30% with the error E1001...

What i am missing ?
[Galaxy Tab S2 Android Development] simon-edwards:
You might want to try Format Data as well as the usual collection of wipes.
[Galaxy Tab S2 Android Development] SteveWe:
That is exactly what i've done to start flashing:

4. Boot into Recovery Mode,

5. Wipe > Advanced Wipe > Select On (enable tick) for Dalvik / Art Cache, System, Data, Internal Storage, Cache,

6. Swipe to Wipe at Bottom of Screen,

7. Back to Main start screen,

8. Wipe > Format Data,

9. Type 'Yes' and press blue checkmark at the bottom-right corner,

10. Go Back to Main Start Screen to Install Rom and GApps,

every time it ends with E1001 after approx. 30% of the process. Any other idea ?

Here are the logs from TWRP if someone is interested in... (is it allowed to upload logfiles? can't attach logfiles so i offer a zip)
[Galaxy Tab S2 Android Development] lpedia:
@SteveWe - I suggest you try the LOS 18.1 ROM from the @retiredtab thread https://xdaforums.com/t/unofficial-rom-beta-lineageos-18-1-for-sm-t810-aug-10-2022.4430349/.

BTW, to upload logs, zip them first. The XDA server doesn't seem to accept text attachments.
[Galaxy Tab S2 Android Development] SteveWe:
Thanks, the Rom u mentioned above seems to work (and flash!). I am happy by now.
[Galaxy Tab S2 Android Development] humanspida:
Hi guys, I was wondering if anyone can share a link to or copy of version 17.1 for the T710 / gts28wifi... Would be great if I could get my hands on it again.

I thought I had it stashed away somewhere safe but I can't find it.

I've also been poking about all over the place on XDA and other places looking for it to no avail so far.

Thanks in advance : )
[Galaxy Tab S2 Android Development] ugooh:
Hi all does anyone have lineageos 17.1 for SM-T715 anywhere please. I had issues with mine. Just discovered one day that it won't boot anymore. I have reflashed TWRP but cannot boot into it in order to try 18.1. Would appreciate if anyone could help with this. Thanks all.
[Galaxy Tab S2 Android Development] masoudsat:
hi I have problem with mobile network after install lineage 18.1 for SM-T715. can anyone help me.
[Galaxy Tab S2 Android Development] RKlement:
Hello everyone I have a Samsung SM-T815 tablet, installing this version would have android 11 right? It improves performance and speed? It currently has the stock ROM with android 7 and some apps do not work very well.
[Galaxy Tab S2 Android Development] RKlement:
Can anyone give me some guidance? I'm new and don't want to kill the tablet. Thanks :)
[Galaxy Tab S2 Android Development] bmwdroid:
This is imo one of the best combinations of how-tos to find:

https://xdaforums.com/t/s4-unified-collection-guides.4224933/#post-84378261.

I've written one mostly for myself BUT it's not fully translated yet.
[Galaxy Tab S2 Android Development] RKlement:
Thanks for the answer, I will read everything today. Someone who has the SM-T815 tablet could tell me how well this version works?
[Galaxy Tab S2 Android Development] RKlement:
Does this ROM allow to install Netflix? I don't care about bank apps because I don't use them on a tablet.
[Galaxy Tab S2 Android Development] metterschling:
For those of you seeking for a LOS 18.1 ROM for T715 with working RIL, you might want to have a look at the following new thread: ALPHA LineageOS 18.1 for SM-T715
[Galaxy Tab S2 Android Development] aljazzair:
Hello

I currently have LineageOS16 installed on my T815C, build date 20201225

Phone calls work but not with headsets.

EDIT: In fact, after some testing in appears no external microphone is working, be it wired headset or bluetooth headphones.

My question is: does the latest build work with a bluetooth headset for making calls, either through the phone app, or through VOIP apps like Signal, Messenger, Skype Whatsapp?

If not which build should I install to get this functionality?

Thank you.
[Galaxy Tab S2 Android Development] metterschling:
If you scroll back one page in this thread you'll read in Post #2435 that LTE (more precisely RIL) is not working on the 18.1 variant, so phone calls are not available at all.

Additionally Bluetooth headset profile (a2dp) seems to have issues for the entire gts2 device family on LOS 18.1, please see this post for details.

You might want to consider going back to stock ROM if you need this functionality.
[Galaxy Tab S2 Android Development] metterschling:
The 18.1 builds in this thread have mobile network issues. Read back some pages and you''ll find more bug reports.

You might want to have a look at this thread: UNOFFICIAL][ROM]ALPHA LineageOS 18.1 for SM-T715. These new builds come with working RIL (Radio Interface Layer) that implements mobile data, telephony, and SMS.
[Galaxy Tab S2 Android Development] aljazzair:
Many thanks for taking the time to answer.

After further testing, I noticed that on my tablet, external mics (wired or wireless) work with google assistant only.

Not with a voice recorder, phone app, voip.

My current build is Lineage 16 from 2020/12/25.

I wish I could upgrade to a LineageOS 17.1 build with LTE support and the ability to place phone and VOIP calls, with a headset.

But could not find Lineage 17 builds in the google repository.

Would you know how they can be found?

View attachment 5747669
[Galaxy Tab S2 Android Development] metterschling:
The 17.1 builds have been removed after the introduction of LOS 18.1, so are no longer publicly available. There may be users in this forum with a private copy, I"m sorry I don't have one.
[Galaxy Tab S2 Android Development] Adler12:
Hello, I have reactivated my SM-T815 LTE. I remembered that LTE does not work under Lineageos. If I remember correctly, it had something to do with the libsec-ril.so. Has something changed there. 18.1 updates (lineage-18.1-20211103-UNOFFICIAL-gts210ltexx) are no longer available and 19 will probably not be.

Nevertheless, I would be interested if someone has managed to activate LTE again?
[Galaxy Tab S2 Android Development] adddy2:
Hi,

today i flashed your ROM on my S2 and love it. But there is point that i like to change: can you help me please

when i press the left button to see all open apps, i see only a button "screenshot" but i like that it will be "close all". how i can change it?

thanks, adddy2
[Galaxy Tab S2 Android Development] bmwdroid:
Afaik there's no way for us "normal" users to change that.

Gotta ask the dev for that.
[Galaxy Tab S2 Android Development] adddy2:
Thanks for the feedback!

@ripee : can you help me? ich have of course root.

thank you

adddy2
[Galaxy Tab S2 Android Development] lpedia:
This is one of the changes Google made to navigation behaviour in Android 11, so is included in LOS 18 and above. It's not specific to this ROM.

Workaround: swipe from left to right when in the open apps list, and you should see a 'Clear all' button at the left.
[Galaxy Tab S2 Android Development] adddy2:
Hi,

ok, thank you!

of course to replace/patch the button to have direct access will be great.

because i use it automatic from my samsung phones & nearly never make screenshots.

regards, adddy2
[Galaxy Tab S2 Android Development] ZammoUK:
I am a total newbie to all this. I have the 810 Samsung S2 Tab (10") and should I download 17.1, 18.1 or go for 19.1 now that is out ? I am still on stock Samsung Android 7. I just want a newer Android for the tablet, I don't care if it is Android 9,10 or 11, whatever works fastest with less bugs out of those 3 versions of Android. I don't play games, just social media, basic VLC video playback, and very basic editing of photos.

Any advice ? Thanks.
[Galaxy Tab S2 Android Development] bmwdroid:
Mine is on this and I didn't encounter any problems:

https://xdaforums.com/t/unofficial-rom-alpha-lineageos-19-1-for-sm-t810-nov-10-2022.4480033/

Has to be on latest stock first.
[Galaxy Tab S2 Android Development] kopfspalter:
Hi guys, I have an Samsung Galaxy T815 Lte Version and my Sim is not working with this Rom. I am now on the stock Rom. Can someone send me the Link to the 17,1 Version of Lineage OS where the LTE was running ?

Can´t find any working rom at the moment. Or maybe someone can link me another good Rom that is not completely outdated ???
[Galaxy Tab S2 Android Development] mikelosat:
Hi friends, I read "T715" in the description but the only download link I can find is "t715/Y".

My device is T715 LTE (gts28ltexx)

Thank you
[Galaxy Tab S2 Android Development] bmwdroid:
You didn't look at the files name in the link, right?
[Galaxy Tab S2 Android Development] mikelosat:
Ok, so can I install it on my sm t715 tablet?
[Galaxy Tab S2 Android Development] mikelosat:
Can you also make and receive calls using bluetooth earphones?

I installed another version of lineageos 18.1 not from this thread and the biggest problems concern the calls, it is possible to make them only with the speakerphone
[Galaxy Tab S2 Android Development] mikelosat:
Has anyone managed to do a FIX Lte?

This version does not allow you to call in 4g mode without having to use the speakerphone.
[Galaxy Tab S2 Android Development] Max_C:
Does anybody have the installation file for LOS17.1 for gts210ltexx (for SM-T815)?
[Galaxy Tab S2 Android Development] GRAM333:
i have t715 lte...i have installed LineageOS 18.1...everything working great but i have no phone....???? says no service ,,,no sim and mobile network is greyed out in settings....no imei number is showing..???..any ideas,????... i flashed again but no luck

....thanksView attachment 5843421
[Galaxy Tab S2 Android Development] Leoshen:
Hello.. just flash this room but why my root change to unroot? Someone help please..

Btw cf root only support till OS 7?
[Galaxy Tab S2 Android Development] GRAM333:
hi.....appreciate all the work that was put in to create this.....seems working great BUT no phone,,,,,is this something that maybe fixed or is this unfixable,,,???.......i love the 4.3 SCREEN s2 tab T715lte and cant find anything to replace it so would be fantastic to have android 11 and working phone even if it only works on speaker phone.....
[Galaxy Tab S2 Android Development] metterschling:
The ROMs in this thread are de facto discontinued. You might give the following one a try:

https://xdaforums.com/t/unofficial-rom-beta-lineageos-18-1-for-sm-t715-february-18-2023.4509345/
[Galaxy Tab S2 Android Development] GRAM333:
great thanks for reply...i will give it a try....
[Galaxy Tab S2 Android Development] samgs2:
Hi,

I have tried for a month to get Udemy App working. Can someone verify it works on there device with this rom please. Thank you in advance. x
[Galaxy Tab S2 Android Development] lefteyecat:
I recalled t715y ( i have this) has little to none support so they made the t715 rom work on both, otherwise you will have to downgrade if you want modem.

They were having troubles in the past so it was best to drop mobile support.
[Galaxy Tab S2 Android Development] GRAM333:
this one is working great,,,you have too use speaker phone to talk and takes 2 second before you join call but everything else seem s working...https://xdaforums.com/t/unofficial-rom-beta-lineageos-18-1-for-sm-t715-february-18-2023.4509345/
[Galaxy Tab S2 Android Development] ZammoUK:
I have just installed this and most things are great, but for some reason Instagram videos are awful quality, like really low bitrate and fuzzy, I don't mean on ones I upload myself (I have never done this) I mean other peoples videos and stories. I have the 810. Any ideas ?

Also the "BT Email" app loads then immediately closes saying it has detected a security risk. Any ideas ? I have tried uninstalling and reinstalling.

Thanks !!
[Galaxy Tab S2 Android Development] bmwdroid:
@ZammoUK afaik this ROM here is discontinued.

My T810 is on this LOS19.1 ROM by @retiredtab:

https://xdaforums.com/t/unofficial-rom-alpha-lineageos-19-1-for-sm-t810-march-18-2023.4480033/

With which I'm very satisfied.

Some people report wifi connection breaks but on mine it automatically reconnects when that happens.