Lineage-14.1-20180419-unofficial-gtel3g Jun 2026

In TWRP, go to "Wipe" -> "Advanced Wipe" and select: Dalvik / ART Cache

Once both installations are complete, tap Reboot System .

The ROM zip file ( lineage-14.1-20180419-UNOFFICIAL-gtel3g.zip ). lineage-14.1-20180419-UNOFFICIAL-gtel3g

Your tablet's exact (found in Settings > About Device, e.g., SM-T561).

The , commonly referred to by its development codename gtel3g (or gtelwifi for the Wi-Fi only model), was a popular budget tablet launched around 2015–2016. While sturdy, its stock Android 4.4.4 (KitKat) firmware quickly became a bottleneck, leaving users unable to install modern applications or enjoy a smooth browsing experience. In TWRP, go to "Wipe" -> "Advanced Wipe"

While newer unofficial builds (e.g., Android 10/11) might exist, they often suffer from hardware issues (broken cameras, broken sensors). This 20180419 build is praised for having fully functional features, including stable hardware, working camera, and sensor functionality.

| Attribute | Value | | :--- | :--- | | | LineageOS 14.1 | | Build Date | 20180419 (April 19, 2018) | | Android Base | 7.1.2 (Nougat) | | Security Patch Level | April 5, 2018 (as per AOSP merge) | | Device Codename | gtel3g | | Status | UNOFFICIAL | | Kernel Version | 3.4.5 (Legacy Samsung Exynos) | The , commonly referred to by its development

Before attempting to flash lineage-14.1-20180419-UNOFFICIAL-gtel3g.zip , you must prepare your environment:

: 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.

LineageOS does not come with Google apps pre-installed. Download the OpenGApps package for ARM , Android 7.1 , and choose the Pico or Nano variant (to save RAM and storage). Step-by-Step Installation Guide