Below are some simple steps for installing Oreo 8.1 Lineage v15.1 on Tab S2 9.7 SM-T819 (gts210veltexx). Androidbiits.com won’t be responsible if Tab S2 9.7 SM-T819 (gts210veltexx) become defective during the installation of Oreo 8.1 LineageOS v15.1. You must charge SM-T819 (gts210veltexx) battery above 84 percentage before using this tutorial.
1. It is vital to download Android 8.1 Oreo Lineage 15.1 (gts210velte) ROM for Samsung Galaxy Tab S2 9.7 SM-T819 on your desktop.
2. It is the time to activate USB debugging and attach SM-T819 with desktop.
3. It is essential to transfer Oreo 8.1 Lineage 15.1 to SM-T819.
4. It is the time to power off SM-T819 and remove the USB cable.
5. It is vital to put SM-T819 into Recovery Mode.
6. It is essential to tap “wipe data/wipe system/factory reset” on SM-T819.
7. It is the time to tap “wipe cache partition” on SM-T819.
8. It is vital to click “install zip from SD card” on SM-T819.
9. It is the time to choose Oreo 8.1 Lineage 15.1 on your SM-T819.
10. It is essential to install Android 8.1 Oreo Lineage 15.1 ROM on Samsung Galaxy Tab S2 9.7 SM-T819.
11. It is the time to go to the main menu on SM-T819 and click “reboot system now” option.
12. It is essential to wait until SM-T819 restarts.
13. You can install GApps 8.1 on Samsung Galaxy Tab S2 9.7 SM-T819 using the above steps.
GAPPS >>> https://forum.xda-developers.com/android/apps-games/arm-unofficial-opengapps-builds-android-t3743495
In my tests extern SD-card is not working and GAPPS ist not connecting and stop working. :(