Go to and tap Build Number seven times to activate Developer Options.
If you're interested in a specifically tested ROM,I can also help you find the latest compatible TWRP version for your device if you tell me your exact build number.
Put the phone in (Power + Volume Down + Bixby button).
: 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
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of this legacy device, custom ROMs offer a way to bypass the performance degradation and security vulnerabilities of outdated stock firmware.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 custom rom for samsung a9 2018
Tailor every aspect of your UI, from status bar icons to system animations. Best Custom ROMs for Samsung A9 2018 (2026 Edition) Because the Galaxy A9 (2018)
If your A9 2018 is running slow, battery life is poor, or you crave the latest Android features, installing a custom ROM is the best way to revive your device. This article explores the best custom ROM options for the Samsung A9 2018, the benefits of upgrading, and how to get it done safely. Why Install a Custom ROM on Galaxy A9 2018?
Users who want a reliable, daily-driver experience. 2. Pixel Experience / PixelPlusUI
Copy the ROM zip and GApps to your device's internal storage or SD card. Go to and tap Build Number seven times
Repeat the step above for the GApps .zip file.
Unlocking the bootloader voids your Samsung warranty. Knox Tripping: Samsung Knox will be permanently tripped (
Secure the specific ROM file matching your device model, a compatible custom recovery (like TWRP or OrangeFox), and a GApps package (if your chosen ROM doesn't include it). Step-by-Step Installation Guide
Before you start, you must prepare your device. Installing a custom ROM will on your phone. : Because the A9 2018 supports Project Treble,
Samsung Galaxy A9 (2018)
Set up minimal ADB and Fastboot tools on your computer.
If you are still rocking this device and feel it lagging behind, installing a custom ROM for the Samsung A9 2018
This process is intermediate-level. Work slowly and carefully.
Upgrading your operating system via unofficial channels offers several major advantages over sticking with factory software:
The Samsung Galaxy A9 (2018) was a groundbreaking mid-range smartphone, famous for being the world’s first phone with a quad-camera setup. Powered by the Snapdragon 660 processor and equipped with up to 8GB of RAM, its hardware remains capable for everyday tasks. However, Samsung officially stopped software support for this device years ago, leaving it stranded on older Android versions.