Title: [ROM][STABLE][Android 14] LineageOS 21 for Samsung S9 Plus Exynos (star2lte) – Daily Driver Ready
Body: After 3 months of testing, here is my review of LineageOS 21 on the S9+ (Exynos).
Working:
Bugs:
Why upgrade from Stock Android 10?
Download: [Link to official LineageOS builds - Note: As of my knowledge cutoff, check XDA for latest builds]
Flashing order:
Thanks to the XDA dev community for keeping Exynos alive.
You might ask, "Is my S9 Plus still worth the hassle?" The answer is a resounding yes—provided you install a custom ROM. Here is why:
| Problem | Solution | | :--- | :--- | | ROM won't boot (bootloop) | Go back to TWRP. Wipe Dalvik & Cache. If that fails, Format Data again. | | No SIM card detected | Flash the latest Exynos 9810 modem firmware via Odin (CP slot). | | Safetynet / Play Integrity fails | Flash Universal SafetyNet Fix via Magisk. Use Shamiko to hide root. | | Screen stays black after call | Proximity sensor calibration issue. Install "Sensor Test" app and reset proximity. | | Battery drains fast | Use BetterBatteryStats to find wakelocks. Disable "Mobile data always active" in Dev Options. | samsung s9 plus exynos custom rom
Unlike the Snapdragon variant (which has a locked bootloader), the Exynos model is developer-friendly. Installing a ROM can provide:
With tools like Franco Kernel Manager or built-in ROM governors, you can undervolt or underclock the Exynos 9810—notorious for its power hunger—to squeeze out an extra hour or two of screen time.
Best for: Pixel lovers.
Warning: This will void your warranty (if any remains) and wipe your data.