Obtain the Next Gen OS v3.7 ZIP file and store it on an external SD card.
To install Next Gen OS v3.7, you must have a custom recovery like installed on your device. next gen os v3.7 for j200g
It includes features like a dark/light mode toggle, new system UI tones, and an updated lock screen layout. Obtain the Next Gen OS v3
Integrated tools like Device Maintenance (Smart Manager), Game Launcher, and native call recording are often ported into these builds. Installation Guide for SM-J200G new system UI tones