Published by: Android Legacy Labs
Reading Time: 8 Minutes
If you still own a J200G, you have likely experienced the following:
Stock Samsung firmware (J200GDDU3ARK1) is notorious for aggressive LMK (Low Memory Killer) daemons that kill foreground apps to keep the launcher alive.
Next Gen OS v3.7 solves this by:
Absolutely—with one caveat.
Flash Next Gen OS v3.7 if:
Do NOT flash if:
Next Gen OS is a lightweight, AOSP (Android Open Source Project)-based custom ROM designed specifically for legacy low-RAM devices. Version 3.7 is the latest iteration tailored for the J200G.
Unlike Samsung’s stock Android 8.1 Go (which is bloated with unnecessary Samsung Experience skins), Next Gen OS v3.7 strips down the system to its bare essentials while injecting modern kernel optimizations. next gen os v3.7 for j200g
Solution: You lost your EFS. Restore your backup from TWRP. If you didn't back up, flash the J200G_Modem_Fix_v2.zip after the ROM.
Note: This assumes you have an unlocked bootloader and TWRP installed.
Step 1: Download the Files
Step 2: Boot into Recovery
Step 3: Wipe Data (Clean Install)
Step 4: Install the ROM
Step 5: Flash GApps & Reboot