The software lineage-14.1-20180419-UNOFFICIAL-gtel3g.zip is a legacy custom ROM designed for the Samsung Galaxy Tab E 9.6 (3G variant, model SM-T561) . It is based on Android 7.1.2 Nougat
Unlock Your Device's Bootloader: This process varies by device but is essential for installing custom ROMs. lineage14120180419unofficialgtel3g patched
What “unofficial” means
lineage14120180419unofficialgtel3g patched The software lineage-14
gtel3g (likely a Samsung Galaxy Grand Prime or similar variant)The ROM likely includes the Android security backports available up to April 2018. Kernel/Bug Fixes: An unofficial, patched build of LineageOS 14
: Because this ROM is from 2018, it lacks recent security patches. For a more modern (though potentially buggier) experience, check the Galaxy Tab E section on XDA for newer 15.1 or 16.0 unofficial ports. Are you looking to install this for better performance on your tablet, or are you trying to fix a specific bug like the camera or boot loop?
: Since LineageOS does not include Google services by default, users must flash a separate package to access the Google Play Store. Legacy Status