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: Known for its stability and "stock Android" feel, it is often the go-to for older hardware. Evolution X
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Your chosen Custom ROM zip file (and matching GApps package if using a vanilla ROM like LineageOS). Step-by-Step Installation Guide Step 1: Back Up Your Data custom rom for samsung a9 2018
Note: Always check the latest compatibility for your specific variant (e.g., Go to product viewer dialog for this item. ) on XDA Developers [2] before downloading.
While specific ROM versions change rapidly, these are the most reliable types of ROMs designed for the Snapdragon 660 chipset found in the 1. LineageOS (Android 11, 12, or higher)
Step 5: Flash the Custom ROM (LineageOS Example) * 5.1 Transfer Files to Your Phone. Make sure you already copied these . ... * 5. Instructables Are custom Android ROMs dead in 2026? - Surfshark This public link is valid for 7 days
supports Project Treble, you can install GSIs like or Evolution X to get the latest Android versions quickly, though these may require more troubleshooting for hardware-specific bugs. Why Switch to a Custom ROM? Software Updates: Official support for the
A locked bootloader prevents any unofficial software from loading. Unlocking it is the very first step to installing any custom ROM. Keep in mind, this process voids your warranty and wipes all data from your phone. To unlock it:
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. Can’t copy the link right now
The gold standard for stability. While official support for the A9 (A920F) varies, unofficial builds often keep it alive on LineageOS 21 (Android 14).
Some popular sources for custom ROMs:
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.
Copy the ROM zip and GApps to your device's internal storage or SD card.
: These often do not work on AOSP-based ROMs for older Samsung devices due to proprietary Samsung drivers.