Interesting by ungoogling my digital life, i recently bought a device to test /e/.
As I don’t have a tablet at home, I bought a Samsung Galaxy Tab S2, also based on the reading of this install page.
As I do not succeed to sideload the zip file (failed signature), I discover that it was the TRWP that was not the good one (i was always in official one using ‘update with adb’ menu) … so i search more and thanks to xda forum, I download a good one : it seems that my tablet is the 2015 model (gts210wifi) and not the 2016 (gts210vewifi) (sic).
So, I’m actually inside Trwp for first time but here is now my questions : is it risky to try to upload the gts210vewifi image on my gts210wifi device ? what are the technical specifications differences ? if so, is these differences could affect my installation and definitively put my device out of order ?
In a quick search I do find an Unofficial LineageOS for SM-T810 [ROM][UNOFFICIAL][11] LineageOS 18.1 [T710][T715][T715Y][T810][T815][T815Y] | XDA Forumsbut I do not see his device tree so far. Your mentioned /e/ ROM states it is SM-T813 specific. If you find references to the two devices sharing a device tree it might be possible to make a better judgement. Good luck.
I just found on this link that there is a difference of processor between Tab S2 2015 and 2016:
SM-T810 aka gts210wifi has a Samsung Exynos
SM-T813 aka gts210vewifi has a Qualcomm Snapdragon
though, I will throw an eye on lineageOs for my device
First, I tried to install unofficial /e/ build found in this post, but it has failed (error 7).
So, I decide to give a try with lineageOS 18.1 and Yes it succeed to install even if adb sideload show an error at 47%. lineageos worked well.
Then I decide to retry with /e/ and the sideload then began, and this time without error but counter to lineageos, /e/ unofficial is looping on “logo + my data is MY data”.
Just a very quick reply. Sometimes (pre Oreo) you can jump Android versions “against the rules” - that is #anti-rollback, other times you need to flash Stock ROM - What is a stock ROM and how do I get one?. Check out the “install page” in your OP for the “official warning”!
Sorry OP= opening post. Remember I do not know what Android version you started from, so I just provided some key words for you. Now that you tried Android 11, you may have fewer options!
is this because of the ARB thing that the unofficial /e/os was looping ?
Seems the most likely explanation.
But, @twiny, an edit; did you wipe Data (that is wipe system,data,cache,dalvik) as you attempted to move from Lineage 18 to 7 Nougat. If not that would be good to try. With a “built for Nougat” device you may be less impacted by anti rollback protection. With my older Samsung I have bumped Android versions, various things went wrong but I previously dug myself out!
The important thing is to read before you jump too much. And it can be significant if you installed Gapps in Lineage, that should be avoided when you attempt to downgrade.
You were right, I didn’t think to wipe before trying to downgrade from lineage v11 to nougat v7 …
I just did it, and it has worked instantly like a charm. (despite the red message at boot: kernel is not seandroid enforcing)
I can now go discovering the benefits of this beautiful ungoogled os
Laurent
PS: However, I had read everything 3 times before starting .
OP= opening post. Remember I do not know what Android version you started from, so I just provided some key words for you. Now that you tried Android 11, you may have fewer options!
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