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.

Before you rush in, understand the trade-offs.

Start with LineageOS 20. It is the most stable, has the largest community, and receives weekly updates. Once you are comfortable, branch out to crDroid or Evolution X.

Your old S9 Plus isn't dead—it's just waiting for a second life.

Resources:

Have you installed a custom ROM on your S9 Plus Exynos? Share your experience in the comments below.

The Samsung Galaxy S9 Plus (Exynos variant, codename ) has one of the most resilient developer communities in the Android modding scene. While Samsung officially ended software support in April 2022 with Android 10, custom ROMs have successfully ported modern versions of Android, including One UI 7 (Android 15) Android 14/13 , to the device as of early 2026. The Current State of Custom ROMs (2026)

The Exynos 9810 chipset in the S9 Plus remains a popular target for "One UI Port" developers who bring the software experience of newer flagships to the 2018 hardware.

Warning: Flashing a custom ROM requires basic technical skill. Follow order strictly.

When Ravi found the Galaxy S9+ in the alley behind his apartment building, it lay face-down on wet pavement like a creature that’d finally given up on running. Rain stitched the black glass in tiny rivers. He flinched at the thought of police reports and lost-data angst, but the curiosity that kept him in the evenings tinkering with old phones won out. He scooped it up, wiped it on his jacket, and felt the familiar kick of a detective’s thrill: an anonymous device is a story waiting to be read.

Back in his cramped kitchen, with a mug of tea growing cold beside the soldering iron and a pile of scratched SIM trays, Ravi powered the phone. It booted to a lock screen wallpaper of a paper crane against a pale blue sky and a single missed notification: “Update completed.” No name. No carrier. It hummed with an Exynos heart — not the Snapdragon phone he remembered from the local markets — and that made it rarer, a slight divergence from routine that excited him.

He tried the obvious: emergency call, common pattern guesses, the old “1234” that sometimes worked for careless passcodes. Nothing. Then he tapped a buried setting in his mind: the bootloader. If he could coax it into recovery, he might at least get a shell into its file system. He was careful; he had read enough warnings about bricked phones to know how quickly curiosity could become regret.

The phone obliged. A black screen with white text blinked awake: Odin Mode. He smiled. Otherwise, he would have had to employ the heavy tools — custom cables, spliced pins, the kind of undertakings that devoured weekends. He breathed in a plan: sideload a custom recovery, flash a new ROM, and trace what had been left behind. It wasn’t stealing; the device seemed abandoned. Besides, he told himself, the phone deserved a second life.

Ravi kept logs. Names mattered to him in the way birds might favor certain perches. He labeled the build “ExoRemnant v1.0,” a custom ROM patched specifically for Exynos models like this S9+. The work involved drafting a new system image: slimming the bloatware, restoring privacy configurations, and merging a handful of community kernels that played nice with Mali drivers. He worked into the night, lines of code and terminal outputs his lullaby. The device’s internals were finicky — old eMMC wear, a misbehaving proximity sensor — but his fingers remembered the rhythm. Flash. Wait. Wipe cache. Reboot.

When it rolled into a clean, custom home screen, an unlocked world spilled out. There were no contacts, no account logins. Only a folder named “Letters” and one text file inside it: FOUND.TXT. The contents were oddly formal for something left behind: “To whomever restores this device — there is a signal inside. If you can hear it, help it.” The file linked to a local app labeled “Beacon,” which demanded a passcode. He could have stopped there and called the phone a ghost. He didn’t.

Ravi’s mind threaded toward the improbable. Phones, after all, were tiny weather systems of human intent: maps, messages, debts, confessions. The Beacon app housed a private database of ephemeral entries with timestamps and geotags. Most were fragments — a photo of a lighthouse, a grocery list, a voice memo that dissolved after three plays. But under them, hidden in a folder named /opt/beacon, was an encrypted packet that noted coordinates: a small island two days’ travel from the city.

Curiosity is a ladder. He climbed. Weeks later, with a backpack, a borrowed boat, and his patched Exynos S9+ snug in a waterproof case, Ravi sailed toward that island. The locals called it Sagan’s Reach, a place the ferry only whispered about after midnight. It was an island of salt-washed ruins and a single functioning radio tower. There, the sky glowed differently: a steady smear of auroral light even though it was not the season for northern displays.

At the base of the tower, he met Ira — a small woman with salt-streaked braid and a gaze that cataloged him immediately. She didn’t ask how he knew to come. She had been expecting someone who could hear an unusual signal: a low, persistent carrier embedded within public LTE broadcasts. They had been trying to localize it for months but needed someone who understood Exynos baseband quirks. Ravi’s saved kernels and his ability to parse unusual logs made him the kind of person they’d placed the note for.

The tower hummed. Its metal bones had been repurposed, patched with homebrew amplifiers and repurposed satellite dishes. The signal was real: an audio-subcarrier tucked into the normal data stream, repeating a short sequence, like a staccato bird call threaded into a song. Whoever sent it knew how to hide information inside the layers of radio traffic, and whoever had left the phone had left a breadcrumb the islanders could find.

They listened together, headphones sharing thin white noise. The sequence resolved into numbers — not coordinates but a cipher. Ira explained quietly: a small collective on the mainland used old phones and ex-Exynos chipsets as portable decoders; they encoded messages inside broadcasts to be picked up by anyone with the right key. The key, it seemed, had been left on this particular S9+. Whoever had been sending the signal was trying to create a new kind of community messaging: anonymous, resilient, hidden in everyday networks.

Ravi flashed modifications to the phone’s baseband drivers — a risky thing on Exynos without proper binaries — and hooked the device up to the tower’s receiver. The phone responded like a nervous animal. Latency dropped. The hidden carrier revealed more patterns and, finally, a voice.

“—R. If you hear this, we hid it where the sea meets the light. Not our names. Not yet. The world’s too loud. We need a place the old hardware can whisper. Take only what you need. Keep the signal alive.”

It was a single garbled message, but the emotion in it — fear braided with hope — pressed on Ravi. He wanted to know who “we” were. He wanted to know why they would choose to hide in the seams of telecoms. Ira’s eyes went distant. “People who don’t fit,” she said. “Activists, ex-engineers, those who want to speak without being listed.”

They found more. The Beacon app contained a chain of micro-transactions, tiny cryptographic proofs leading to caches of physical data hidden on the island: a thumb drive under a rock wall, paper manifestos sealed in a jar, a small library of printed emails and sketches. The materials were not seditious so much as aching: plans to build resilient local networks, to smear public logs with noise, to preserve communities’ ability to coordinate without central oversight.

But not everyone wanted the signal to survive. A company had been tracking anomalies in its probes, and its investigators were closing in. The next storm would likely be the last chance to move the caches. The choice fell into a simple equation: keep the signal and risk exposure, or disperse the knowledge and let the idea diffuse like salt in water.

Ravi suggested a middle path. They would replicate and fragment the caches, distributing bits across older phones — obsolete Exynos models like his S9+ — and hide them inside benign app updates and obfuscated storage compartments. The message would survive as culture rather than a single repository. They would seed a network of devices configured to rebroadcast the carrier at low power during routine off-peak hours, making it indistinguishable from noise unless you knew the pattern.

It was painstaking. Nights stretched into days as they soldered microSDs into weatherproofed cases and turned dead phones into living archives. The island became a workshop of ghosts: people who had chosen the hard labor of maintaining whispers instead of shouting into loud global platforms. The work felt sacred. They spoke little of fame. The goal was simple: keep the possibility of untracked, anonymous conversation — a thread for future strangers to pick up.

On the final night, before they dispersed the last caches, Ravi sat under the tower. Ira handed him a small paper crane — the same motif as the phone’s original wallpaper — folded from waterproof paper. “For luck,” she said. He realized then the paper crane had been a signature, a quiet stamp used by the group as a mark of trust. Whoever left the S9+ had meant for someone like him to find it: someone who could listen and act.

When they left, the island receded like a secret closing its eyelids. Back in the city, the S9+ hummed on his desk, its screen asleep but its antenna alive. The custom ROM he had written now had a different purpose: to be a seed. He installed small, safe routines that would awaken on specific date patterns and emit the carrier for a minute or two before going back to sleep. Each phone he had modified mirrored portions of the cache and the software necessary to reconstruct it — a digital diaspora.

Months passed. The carriers detected anomalies and the investigators searched, but the data fractured into so many benign fragments that it blurred. People found the signal in the margins: a fisherman catching a faint pattern on an old handset, a student downloading a curious update that unlocked an artful text about decentralization, an engineer who had once worked for the big carriers and felt, unexpectedly, moved to help keep the network alive.

Ravi never met the original senders. He imagined them as a cluster of short notes and quick hands, laughter cut with caution. He kept one of the paper cranes in a jar on his shelf, a reminder that sometimes technology’s best work is not to centralize more power but to let whispers travel.

Years later, when his hair started to silver and his hands remembered soldering less, Ravi would tell a single person about that night on Sagan’s Reach. The person asked if what they’d done was illegal, romantic, or naive. He shrugged. The line between law and necessity had always been thin. He said only that the world needs more ways to speak that don’t ask for names up front — that a single phone, patched and repurposed, had become a beacon for small rebellions of care.

If you pressed him, he’d say the phone never belonged to anyone anymore. It belonged to a method: a dispersed archive of small kindnesses and private ideas, kept alive inside obsolete silicon. The last signal, he realized, was not about one message but about the act of listening — and teaching others how to listen too.

Here’s a grammatically proper version of your phrase, depending on how you intend to use it:

As a search term or title:

“Samsung S9 Plus Exynos Custom ROM”

As a full sentence:

“A custom ROM for the Samsung S9 Plus (Exynos version).”

If asking a question:

“What is the best custom ROM for the Samsung Galaxy S9 Plus with Exynos?”

Key corrections made:

Breathing New Life into the Samsung Galaxy S9 Plus Go to product viewer dialog for this item. (Exynos) in 2026 Samsung Galaxy S9 Plus Go to product viewer dialog for this item.

was a titan of its era, and in 2026, it remains a testament to Samsung's premium build quality. However, while the hardware holds up, the official software—stuck on Android 10 with One UI 2.5—has long since reached its end of life.

For Exynos variant users (model G965F), custom ROMs are the ultimate "fountain of youth," offering everything from the latest Android versions to modern One UI features found on the S24 series. The Top Custom ROMs for S9+ Exynos (2026) The development scene for the

remains surprisingly active, with several distinct paths you can take depending on your preference for features versus stability.

Noble ROM 4.2 (latest) S9/S9+/N9 Exynos | Android 14, One UI 6.1

The story of the Samsung Galaxy S9 Plus (Exynos variant) in the custom ROM world is one of defiance against planned obsolescence. While Samsung officially ended support for the device in April 2022 after reaching Android 10, a dedicated community of developers has kept the hardware relevant well into 2026. The Quest for Modern Software The S9 Plus, powered by the Exynos 9810

, became a favorite for modders due to its unlockable bootloader—a luxury often denied to its North American Snapdragon counterparts. Users typically seek custom ROMs for three main reasons: Performance Restoration

: Many users reported that older stock software became "unusable" at night or sluggish over time; custom ROMs often maintain high performance without the 5–6 hour degradation seen on stock firmware. Aesthetics and Features : While some want the clean, minimalist look of Pixel Experience , others prefer the "ported" experience of newer

versions (like One UI 7) that Samsung never officially released for the S9+.

: Official patches stopped years ago, making custom ROMs the only way to get modern security updates. The "Big Three" of S9+ Modding

Over the years, a few projects have defined the experience for this device:

Samsung Galaxy S9 Plus (Exynos variant) , codenamed , remains a highly active device in the custom development scene in 2026. While official manufacturer support has ended, community-driven projects like offer modern Android versions, including ports of Android 14, 15, and 16 Top Custom ROM Recommendations (2025–2026)

The choice of ROM depends on whether you prefer the original Samsung experience ( ) or a clean, Google-like experience ( Samsung One UI Experience (Best for Feature Retention) Noble ROM (Recommended)

: Developed by AlexisXDA, this is widely considered the gold standard for Exynos S9+ users. Latest Versions : Recently updated to Noble ROM 5.2 , providing a stable One UI 7 (Android 15) experience ported from the Galaxy S24 Ultra. Highlights : Retains core Samsung features like Secure Folder Bixby remapping Samsung Dex Performance

: Includes "Hardly Debloated" tweaks and custom kernels for improved smoothness and battery life. : An alternative port of

that offers a full installation guide specifically for the S9+ Exynos 9810 chipset. Stock Android & Performance (AOSP/Pixel-like) Install Android 16 LineageOS 23 ON Galaxy S9 Plus

For the Samsung Galaxy S9 Plus (Exynos), custom ROMs are the primary way to access modern Android versions and updated features long after official support ended. As of April 2026, the development community remains active, with recent ports bringing Android 15 and 16 to the aging flagship. Top Custom ROMs for S9 Plus Exynos (2025–2026)

The choice depends on whether you prefer the familiar Samsung One UI experience or a clean "Pixel-like" stock Android feel. Noble ROM (Recommended for One UI fans):

Current Version: Noble ROM 5.x/6.x based on Android 14 & 15 (One UI 6.1 / 7).

Features: Ports official Samsung features from newer flagships, including modern UI elements and updated Samsung apps. Pros: Familiar interface; includes One UI 7 features.

Cons: Higher battery consumption and slightly slower performance compared to AOSP-based ROMs. LineageOS (Recommended for performance/longevity):

Current Version: Unofficial builds now reaching Android 16 (LineageOS 23) as of early 2026.

Features: A clean, bloat-free experience that prioritizes stability and speed.

Pros: Significant performance boost; lightest weight; offers the latest security updates.

Cons: You will lose Samsung-specific features like VoLTE and Wi-Fi calling. Duhan ROM:

Current Status: A newer contender providing updated builds based on Android 15.

Focus: Aimed at users who want a balance of new features and better battery optimization than Noble ROM. Key Benefits & Trade-offs Feature Stock ROM (Official) Custom ROM (AOSP/Lineage) Custom ROM (One UI Port) Android Version Android 10 (Dead) Android 13–16 Android 13–15 Performance Sluggish over time Very Fast/Smooth Battery Life Heavy Drain Samsung Pay/VoLTE Broken Broken Camera Quality Good (requires GCam) Near Stock Installation Requirements Before flashing, you must prepare your device:

Unlock Bootloader: Only possible on the Exynos variant (SM-G965F/DS).

Custom Recovery: You need TWRP Recovery or a ROM-specific recovery to flash the files.

Backup: All data will be wiped during the mandatory Format Data step.

Files Needed: The ROM zip file, GApps (if not included), and potentially a "repartitioner" script for larger One UI ports. Critical Warnings

The Samsung Galaxy S9 Plus (Exynos) has reached its official end-of-life, but a thriving developer community continues to breathe new life into it through custom ROMs

. As of 2026, you can upgrade your device to modern Android versions—even Android 15 —far beyond Samsung’s official Android 10 limit. Top Custom ROM Picks for 2026

For the best experience, choose a ROM based on whether you want a modern Samsung feel or a clean, Google-like interface.

The Samsung Galaxy S9 Plus (Exynos variant, codename star2lte) officially stopped receiving updates at Android 10 (One UI 2.5). However, a dedicated developer community continues to release custom ROMs that bring modern features like One UI 7 and Android 16 to this legacy hardware. 🚀 Popular Custom ROMs for S9+ Exynos

Noble ROM: A high-profile port that brings modern One UI experiences (up to One UI 5 and 6) to the S9 series.

LineageOS: The standard for a clean, "Stock Android" experience; unofficial builds are available for Android 16 (LineageOS 23).

DuhanROM / CornROM: Specialized ports designed to bring One UI 7 (Android 15) features to the Exynos 9810 chipset.

Pixel Experience: Ideal for users who prefer the interface of Google Pixel devices over Samsung's One UI. 🛠️ Prerequisites for Installation

To install any custom ROM, your device must meet these technical requirements: Install Android 16 LineageOS 23 ON Galaxy S9 Plus

Unlike the Snapdragon variant (which has a locked bootloader), the Exynos model is developer-friendly. Installing a ROM can provide:

Samsung stopped updates at Android 10. Today, most banking apps and enterprise software require Android 12 or higher. Current custom ROMs for the S9 Plus offer Android 14 (One UI 6.1 ports or AOSP 14) . You can literally have the same software features as the Galaxy S24 on your S9 Plus.

Samsung S9 Plus Exynos Custom Rom Now