2018 [verified] | Custom Rom For Samsung A9

Samsung Galaxy A9 2018 (model SM-A920F) is a unique device in Samsung's history, famously being the world's first smartphone with a quad-camera system. While its official software support peaked at Android 9.0 Pie

with Samsung Experience 9.0, the custom ROM community has extended its life significantly. The Appeal of Custom ROMs for the A9 2018

For owners of this legacy device, custom ROMs offer a way to bypass the performance degradation and security vulnerabilities of outdated stock firmware. By installing a custom operating system, users can: Access Modern Android Versions

: Bring the device up to Android 13, 14, or even newer through community-developed builds. Remove Bloatware

: Replace heavy Samsung skins with clean, lightweight versions of Android like AOSP-based Improve Performance

: Achieve better optimization and benchmarks (like AnTuTu) compared to the original One UI. Popular ROM Options While official support for major ROMs like Pixel Experience

ended in early 2024, users can still find stable, unofficial builds or alternative projects:

: Known for its stability and "stock Android" feel, it is often the go-to for older hardware. Evolution X

: A popular choice for those wanting a Pixel-like interface with extra customization features and performance tweaks. GSI (Generic System Images)

: Because the A9 2018 supports Project Treble, users can flash universal "GSI" ROMs which allows for a wider variety of modern Android versions beyond device-specific builds. Technical Prerequisites and Risks

Transitioning to a custom ROM is a technical process that requires several critical steps: How to Install a Custom ROM on Any Android Phone (Example

Popular Custom ROMs for SM-A920F

| ROM Name | Android Version | Key Features | Stability | |----------|----------------|--------------|-----------| | LineageOS 20 | Android 13 | Pure AOSP, minimal, monthly security patches | Stable for daily use | | LineageOS 21 | Android 14 | Newer UI, improved privacy features | Beta / Unofficial | | crDroid | Android 13 | Customization-focused, performance tweaks | Stable | | Project Elixir | Android 13 | Pixel-like UI, good balance of features | Stable | | Evolution X | Android 13 | Pixel experience with extra customizations | Stable |

Note: Android 14/15 ROMs are rare and may have bugs (e.g., camera, NFC, or fingerprint sensor issues).

4.3 Project Elixir (Android 13)

• Focus: Pixel-like UI
• Bug: Auto-brightness sluggish on some units

Final Verdict:

• Recommended for: Tech enthusiasts, privacy-focused users, and anyone wanting Android 13/14.
• Not recommended for: Beginners unfamiliar with ADB/Odin, or those needing VoLTE or perfect camera quality.

2. crDroid 10 (Android 14) – For Customization Lovers

• Based on: Android 14
• Stability: 8/10 (Beta stage for A9)
• Best for: Users who want the absolute latest Android version with granular controls.
• Features: Custom status bar icons, lock screen clocks, live wallpapers, and performance profiles.
• Known bug: Some users report front camera lag in third-party apps.
• Download: crDroid official website – device codename “a9y18lte”

What Works and What Doesn’t

Fully functional in most stable ROMs:

• Wi-Fi, Bluetooth, Mobile data, Calls, SMS
• Fingerprint sensor
• Audio (speaker & headphone jack)
• Quad cameras (but limited to stock camera app’s capabilities; GCam may work partially)

Known issues (vary by ROM):

• NFC – often broken or unstable on custom ROMs
• Samsung-specific features – Samsung Pay, Secure Folder, and Good Lock will NOT work
• Widevine L1 – may downgrade to L3, breaking HD playback on Netflix/Prime Video (unless you backup stock DRM keys)
• VoLTE/VoWiFi – usually not supported on AOSP-based ROMs

A Deep Dive into Custom ROMs for the Samsung Galaxy A9 (2018): Breathing New Life into a Quad-Camera Pioneer

Introduction: The Forgotten Mid-Ranger

The Samsung Galaxy A9 (2018) was a bold experiment. As the world’s first smartphone with four rear cameras, it aimed to bring versatility to the mid-range segment. However, like many Samsung phones from this era, it shipped with the heavy, resource-hungry Samsung Experience UI (later One UI). Fast forward a few years, and the official software support has long ended, leaving users stuck on Android 10 (One UI 2.1) with outdated security patches. custom rom for samsung a9 2018

Enter the custom ROM community. For those willing to tinker, custom ROMs offer a lifeline. After spending two months flashing, testing, and daily driving several ROMs on my A9 (SM-A920F), here is my exhaustive review of the current landscape.

Why Bother with a Custom ROM on the A9 2018?

Before diving into specific builds, let’s address the elephant in the room: Is it worth it?

• The Pros: Dramatically improved performance (the Snapdragon 660 feels snappier without Samsung’s laggy UI overlay), up-to-date security patches (Android 13/14 vs stock Android 10), vastly better RAM management, and a stock Android experience reminiscent of Pixels.
• The Cons: You lose Samsung-specific features (Secure Folder, Samsung Pass, Good Lock). The quad-camera setup is reduced to a basic single-lens functionality in most ROMs. Samsung Pay is gone. Also, there is always a risk of bricking if you are not careful.

The Main Contenders (Status: Early 2025)

The A9 2018 is not as popular as the Galaxy S series, but a few dedicated developers on XDA and Telegram have kept it alive. The most stable and actively maintained ROMs are:

1. LineageOS 20 (Android 13) – The most stable daily driver.
2. Project Elixir (Android 13/14) – For those who want customization.
3. crDroid (Android 13) – Feature-packed but slightly heavier.
4. Pixel Experience / PixelOS (Android 13) – For the pure Google experience.

Detailed Review: LineageOS 20 – The Gold Standard

I spent three weeks on LineageOS 20 (Unofficial, maintained by a developer named Aarav on Telegram).

Installation Experience: Moderate difficulty. You need to unlock the bootloader (which wipes data and trips Knox—but on an old phone, who cares?), install a custom recovery (TWRP), and then flash the ROM. The instructions are clear, but newbies might struggle with the vendor partition requirements. Warning: The A9 has a fragile bootloader unlock process; you must enable OEM unlocking in dev settings and wait for the 7-day timer if you just reset the phone.

Performance & Daily Use: 9/10 Wow. The difference is night and day. Stock One UI 2.1 feels like wading through molasses. LineageOS 20 is fluid. Apps open faster, the app drawer doesn’t stutter, and the 6GB of RAM finally feels like 6GB. UI transitions are smooth at 60Hz (the screen is only 60Hz anyway). Gaming (Call of Duty Mobile on medium settings) is actually more stable because the CPU isn’t throttling under Samsung’s thermal profile.

Battery Life: 8/10 With the original 3800mAh battery (now several years old), I averaged 5.5 to 6 hours of screen-on time. That’s about 30 minutes more than stock. Idle drain is excellent—losing only 2-3% overnight. Adaptive battery works better here than on stock.

The Quad-Camera Situation: 5/10 Here is the biggest compromise. Stock Samsung camera software is proprietary. On any AOSP-based ROM, the four cameras (Telephoto, Ultra-wide, Depth, Main) are reduced to just the main 24MP shooter. You cannot switch to the 2x optical zoom or the ultra-wide lens. The Google Camera (GCam) port (specifically for SDM660) helps—it takes better main camera photos than stock thanks to HDR+—but you lose hardware-level switching. If you rely on those extra lenses, do not flash a custom ROM.

Connectivity & Bugs:

• Wi-Fi/Bluetooth: Perfect. No drops.
• NFC: Works for Google Pay (if you hide root with Magisk).
• Audio: Works fine, but the dual speaker mod (using earpiece as second speaker) from stock is gone.
• Known bug: Auto-brightness is a little slow to react. Also, VoLTE works on some carriers but not all; check your region.

Project Elixir – The Customization King

After Lineage, I tried Project Elixir. It’s based on AOSP but with tons of customizations—status bar icons, lock screen clocks, monet theming, and a built-in launcher that feels like OneUI’s app drawer mixed with Pixel.

Performance: Slightly heavier than LineageOS. You’ll notice a micro-stutter when pulling down the notification shade 10% of the time. Battery life is 30 minutes less.

Why choose this over Lineage? If you miss Samsung’s “Good Lock” style customization, this is your answer. The amount of UI tweaks is staggering. However, stability takes a minor hit. Samsung Galaxy A9 2018 (model SM-A920F) is a

PixelOS – For the Purist

This one aims to replicate the Pixel experience exactly. It comes with Google apps pre-included, Pixel launcher, and even the “At a Glance” widget.

The good: It feels like a Google phone. The camera (using GCam) integrates nicely. The call screening feature (on supported regions) works. The bad: The ROM maintainer for A9 lost interest, so the last update was 7 months ago (Android 13 QPR3). Security patch is outdated. I wouldn’t use this for banking.

The Major Dealbreakers You Must Know

1. Camera is crippled. If you use ultra-wide or telephoto daily, stick with stock Android 10.
2. Samsung Good Lock / Secure Folder is gone. No way around it.
3. No Android 14 (stable) yet. While some devices get A14, the A9’s A14 builds are experimental with broken RIL (mobile data). Stick to Android 13.
4. SafetyNet / Play Integrity: Out of the box, most ROMs fail Google’s Play Integrity checks. You must root with Magisk and install a module like “Play Integrity Fix” to use Google Pay or banking apps. This adds maintenance overhead.

Who is this custom ROM for?

• The Tinkerer: You enjoy the process of flashing and optimizing.
• The Privacy-Conscious User: You want to de-Google or run Graphene-like features (though note: no official Graphene for A9).
• The Performance Seeker: You hate how slow One UI has become and just want a snappy device for social media, browsing, and light gaming.
• Someone with a dead motherboard: If you brick your A9, you aren’t losing a $1000 phone.

Who should absolutely avoid this?

• Camera enthusiasts (you bought the A9 for its quad lenses).
• Samsung ecosystem users (Galaxy Buds features, Galaxy Watch integration).
• Someone who needs “it just works” with no tinkering.

Final Verdict: Is it worth it in 2025?

Yes, conditionally.

If your Galaxy A9 2018 is collecting dust in a drawer because it’s too slow to use as a daily driver, a custom ROM will give it 2 more years of useful life. Go with LineageOS 20. It is the most stable, best-performing option. You’ll gain speed, security updates, and a modern Android interface.

However, if you still rely on the ultra-wide camera for photos or use Samsung Pay daily, stay on the final official One UI 2.1 (Android 10). No custom ROM can give you those proprietary features.

Scorecard (LineageOS 20 as benchmark):

• Performance: 9/10
• Battery Life: 8/10
• Camera (Main): 7/10 (with GCam)
• Camera (Versatility): 2/10
• Stability: 8/10 (one random reboot per week)
• Community Support: 5/10 (small but helpful Telegram groups)
• Recommended for daily driver? Only if you can live without wide/telephoto lenses.

Pro Tip: Before flashing, back up your stock EFS partition (IMEI data) via TWRP. The A9 is known to occasionally lose IMEI on custom ROMs, and without that backup, you’re left with a WiFi-only tablet.

For the Samsung Galaxy A9 (2018) (model SM-A920), installing a custom ROM is a popular way to bypass its official Android 10 update limit and reach newer versions like Android 15 via GSIs.  Essential Preparation 

Identify Your Model: This guide applies to the SM-A920F, SM-A920N, and SM-A9200.

Backup Data: Customizing your ROM will erase all personal files.

Battery: Charge to at least 70% to avoid power failure during flashing. Popular Custom ROMs for SM-A920F | ROM Name

Knox Warning: Unlocking the bootloader permanently trips Knox, which disables Samsung Pay and Secure Folder forever.  Top ROM Options for A9 2018 

Since official device-specific builds are rare, users often rely on GSIs (Generic System Images) or unofficial community ports: 

LineageOS: The most popular choice for a clean, bloatware-free experience.

Evolution X: Recommended for those wanting a Pixel-like interface with advanced customization and improved performance scores.

Pixel Experience: Aims to mirror the software on Google Pixel devices.  Step-by-Step Installation Guide  1. Unlock the Bootloader 

Go to Settings > About Phone > Software Information and tap Build Number 7 times to enable Developer Options.

In Developer Options, toggle OEM Unlocking and USB Debugging to ON.

Boot into Download Mode: Power off, then hold Volume Up + Volume Down while connecting to a PC.

Long-press Volume Up to unlock the bootloader; the device will factory reset.  2. Flash Custom Recovery (TWRP) 

The Samsung Galaxy A9 (2018), known for its pioneer quad-camera setup and reliable Snapdragon 660 chipset, has officially reached its software end-of-life after receiving Android 10. However, a custom ROM can breathe new life into this aging hardware, offering modern Android versions, improved performance, and enhanced privacy. Why Install a Custom ROM on the Galaxy A9 (2018)?

Extended Software Support: While official updates stopped at Android 10, custom ROMs can bring your device up to Android 12 or 13 via GSI (Generic System Image) or unofficial builds.

Performance Boost: Custom ROMs often remove Samsung's heavy One UI "bloatware," resulting in a smoother, more responsive experience and better multitasking.

Privacy and Security: Stay protected with the latest Android security patches that Samsung no longer provides for this model. Best Custom ROM Options

While specific "official" builds may vary over time, the following types are popular for the Galaxy A9 (2018):

6. Risks & Limitations

| Risk | Severity | Mitigation | |------|----------|-------------| | Hard brick due to anti-rollback | High | Never flash older bootloader than current | | IMEI loss | Medium | Backup EFS via TWRP before flashing | | Knox permanent trigger | Irreversible | Accept before proceeding | | No VoLTE = no calls on some carriers | Medium | Use 2G/3G fallback or stay stock |