The installation of custom ROMs, including LineageOS 14.1-20180419-UNOFFICIAL-gtel3g, may void your device's warranty and may cause data loss. Proceed with caution and at your own risk.
On the original stock Android 4.4.2:
Early LineageOS 14.1 builds on the Tab 3 suffered from a severe memory leak caused by the mdss_fb display driver. After 48 hours of uptime, the tablet would become unusable. The April 19 build includes a backported kernel patch that resolved this leak, allowing for weeks of stability. lineage-14.1-20180419-UNOFFICIAL-gtel3g
Light titles run smoother; heavy 3D games remain limited by the hardware. The installation of custom ROMs, including LineageOS 14
: This indicates that the ROM is based on LineageOS, which is a popular custom Android distribution that is known for its stability, customizability, and being free from bloatware. After 48 hours of uptime, the tablet would become unusable
: As an unofficial legacy build, it was often used to provide newer Android features to the Tab E when official support from Samsung ended. Known Issues