| Test | Stock Lollipop | Next Gen OS v3.7 | |------|----------------|--------------------| | Antutu 9 | ~22,000 | ~24,500 | | RAM after boot | 825 MB used | 540 MB used | | App opening (WhatsApp) | 6.2 sec | 4.1 sec | | Multitasking (3 apps) | Heavy reload | Stays in memory | | Battery web browsing | 4h 20m | 5h 10m |
| File | Where to find | |------|----------------| | Next Gen OS v3.7 for J200G | Search on XDA Forums – “J200G Next Gen OS 3.7” | | Open GApps (optional, ARM, Android 9) | opengapps.org (pico recommended) | | Magisk (if not pre-rooted) | GitHub – topjohnwu Magisk |
The developer, known as AstraMods, has confirmed in a recent GitHub commit that Next Gen OS v4.0 is in alpha testing. It will be based on Android 14 Go (Tiramisu) with a backported Linux kernel 4.4. However, v3.7 will continue to receive security patches until Q3 2025. next gen os v3.7 for j200g
The community has also ported Swap Torpedo (a memory defragmentation script) for v3.7, which further reduces lag after 72 hours of uptime.
Warning: Installing custom ROMs voids warranty and carries a risk of bricking your device. Proceed at your own risk. | Test | Stock Lollipop | Next Gen OS v3
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. Warning: Installing custom ROMs voids warranty and carries
Absolutely—with one caveat.
Flash Next Gen OS v3.7 if:
Do NOT flash if: