| 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. |
You are stuck on Android 10. With a custom ROM, you can jump directly to Android 13 (or Android 14 via Beta ROMs). Imagine using Material You theming, better privacy dashboards, and notification bubbles on your "old" S9.
Samsung implements a hardware fuse called Knox. samsung s9 plus exynos custom rom
Model Numbers: SM-G965F / SM-G965FD
The Galaxy S9 Plus (codename star2lte) represents a pivotal point in Samsung’s history. It was the last flagship to feature a working 3.5mm headphone jack paired with top-tier specs, while also sporting the infamous "Infinity Display" without the pill-hole cutout of later models. | Problem | Solution | | :--- |
However, as the device ages, official software support has ended. For the Exynos variant (the version sold globally, outside the US/China/Korea), installing a custom ROM is the best way to breathe new life into the phone, gaining modern Android features, improved privacy, and debloated performance.
Here is everything you need to know.
Here are the current heavy hitters on XDA Forums and Telegram:
Using a phone with a 2020 security patch is dangerous. Custom ROMs merge the latest Android Security Bulletins monthly. You are safer on a custom ROM from 2025 than on stock firmware from 2020. You are stuck on Android 10
Unlike the Snapdragon variant (which has a locked bootloader), the Exynos model is developer-friendly. Installing a ROM can provide: