Samsung S9 Plus Exynos Custom Rom Apr 2026

The ROM he chose was called —a cheeky name for an S9 resurrected. Based on Android 14, it promised debloated AOSP aesthetics, kernel-level optimizations for the Exynos chip, and something called "HMP Scheduler tweaks" that claimed to turn the 4+4 big.LITTLE core setup into something actually efficient.

Stock firmware had kept the phone awake constantly, polling for Samsung’s telemetry. Now, the Exynos modem was quiet. The only things running were the apps he chose. He calculated the idle drain: 0.3% per hour. On a four-year-old battery.

Leo leaned in. The Samsung logo dissolved, replaced by a minimalist boot animation—a swirling constellation of white dots. It was clean. It looked like a Pixel phone’s cooler European cousin. samsung s9 plus exynos custom rom

His heart pounded as he typed the ADB commands.

He tapped it.

The screen flickered.

Deep sleep: 98% when idle.

Over the next week, Leo discovered the soul of the Exynos chip.

"You are no longer a user. You are the maintainer." The ROM he chose was called —a cheeky

For two years, the S9 Plus had been a dutiful, boring servant. Android 10. One UI 2.5. The last official update from Samsung was a security patch from March 2021. The phone was a ghost of its former flagship self—fast enough, sure, but bloated with the "Smart Things" framework, Facebook services he never asked for, and a battery that drained like a sieve because the Exynos 9810’s custom Mongoose cores ran hot just checking the weather.