In some 2018 builds, the 3G data connection might show "No Service" despite the SIM being recognized.
If the tablet feels sluggish, set this to "At most 2 processes." Why stick with 14.1?
This guide provides a comprehensive walkthrough for installing and optimizing the build dated 2018-04-19 for the Samsung Galaxy Tab 4 10.1 (3G variant, codename: gtel3g) . lineage14120180419unofficialgtel3g fix
Select Install , find the Lineage zip, and swipe to flash.
It is often helpful to "Wipe Cache/Dalvik" one last time before rebooting. Reboot: The first boot may take 5–10 minutes. Post-Installation Optimization In some 2018 builds, the 3G data connection
Use OpenGApps (ARM / 7.1 / Pico) . The "Pico" version is the lightest, preventing the system from lagging under the weight of unnecessary Google background processes. Installation Steps Prerequisites: Unlocked Bootloader: Standard for the SM-T531. Custom Recovery: TWRP (3.0.0 or higher). The Files: lineage-14.1-20180419-unofficial-gtel3g.zip open_gapps-arm-7.1-pico.zip Magisk (Optional, for root access). Step-by-Step Guide: Backup: Back up your current ROM and data via TWRP.
Immediately after the ROM, flash the GApps zip. Do not reboot between these steps. Select Install , find the Lineage zip, and swipe to flash
If you are looking for this specific "unofficial" build, you are likely trying to breathe new life into an aging tablet while maintaining the stability of the 3G radio and system performance. Understanding the "gtel3g" Build
While this build is remarkably stable, users often encounter three specific hurdles that require "fixes" during or after installation: 1. The "Status 7" Error (TWRP Fix)
Once booted, the can be further "fixed" for better performance: