Oppo locks its bootloaders aggressively. Unlike Samsung or Google, Oppo does not provide an official bootloader unlock tool for the A9. You will have to rely on:
Warning: Unlocking the bootloader on an Oppo A9 wipes your /persist partition if done incorrectly, which can kill your fingerprint sensor and Wi-Fi MAC address. Always back up your NVRAM first.
The Oppo A9, released in mid-2019, was a budget-tier device utilizing the MediaTek Helio P70 chipset. Due to Oppo’s restrictive software policies (ColorOS) and the specific hardware platform, the custom ROM development scene for this device is limited, unstable, and largely inactive. Users seeking a stock Android experience or modern Android versions (12/13/14) face significant risks regarding stability and security.
Development for these ROMs on the Oppo A9 was scarce. If found, they were almost certainly based on the same device trees as the LineageOS builds, inheriting the same bugs.
The Oppo A9 serves as a case study in how hardware choices (MediaTek) and software policies (Oppo) can limit the lifespan of a device in the enthusiast community. While custom ROMs do exist for Android 9, 10, and 11, they are unofficial, buggy, and outdated. There is no viable path to modern Android versions for this device via custom ROMs.
Unlock the Full Potential of Your Oppo A9: A Guide to Custom Roms
Hey Oppo A9 users!
Are you tired of the same old ColorOS experience on your device? Do you want to explore new features, improve performance, and breathe new life into your phone? Look no further! The world of custom Roms is waiting for you.
In this post, we'll dive into the world of custom Roms for Oppo A9, exploring the benefits, popular options, and a step-by-step guide to get you started.
Why Custom Roms?
Custom Roms offer a level of customization and control that's not possible with stock firmware. With a custom Rom, you can:
Popular Custom Roms for Oppo A9
Some popular custom Roms for Oppo A9 include:
Getting Started: A Step-by-Step Guide
Before we dive into the installation process, make sure you:
Now, follow these steps to install a custom Rom:
Conclusion
Unlock the full potential of your Oppo A9 with a custom Rom. With a wide range of options available, you're sure to find a Rom that suits your needs. Remember to always follow proper installation procedures and backup your data to ensure a smooth transition.
Share your custom Rom experiences, favorite Roms, and tips in the comments below!
Happy flashing!
The pursuit of a custom ROM for the Go to product viewer dialog for this item. (specifically the 2019/2020 CPH1938 model Go to product viewer dialog for this item.
) is a journey through the evolution and eventual tightening of the Android ecosystem. While once a vibrant scene of nightly builds and experimental features, the current landscape for this specific device is defined by significant hardware and software barriers. The Technical Barrier: The Bootloader Lockdown
The primary obstacle for any Oppo A9 user is the locked bootloader. A bootloader is the foundational software that initializes the hardware and boots the operating system. For security and control, Oppo—along with many modern manufacturers—has made it nearly impossible to unlock this component.
Official Restrictions: Oppo has largely removed official methods for bootloader unlocking. Even if "OEM Unlocking" is visible in developer settings, it rarely functions as a gateway to full access on these devices. Community Hesitation:
Because official support is absent, many developers refuse to build ROMs for these devices, as the risk of "bricking" (permanently disabling) the phone is extremely high without a standard unlock path.
Unofficial Exploits: While some specialized tools and "test point" methods exist to bypass these locks on MediaTek-based variants (like the Oppo A9 Custom Rom
), these are high-risk maneuvers usually reserved for professional repair or advanced enthusiasts. The Software Landscape in 2026
Even if the bootloader barrier is breached, the availability of ROMs for the
is sparse. The device, launched in 2019, is now considered legacy hardware that can no longer comfortably support the demands of modern software upgrades.
Installing a custom ROM on the Oppo A9 (2020) enhances performance, updates the software, and offers increased customization after official support has ended. Popular options include LineageOS and Pixel Experience, which provide a cleaner, more modern interface compared to stock ColorOS. For a comprehensive guide on installing a custom ROM, see the instructions on Instructables.
Oppo A9 2020 (CPH1937/CPH1938) is a challenging device for custom ROM development due to Oppo's historically restrictive bootloader policies and the device's age. While the hardware remains capable in 2026, official software support ended years ago, making custom ROMs or Generic System Images (GSIs) the primary way to access newer Android versions like Android 14 or 15. 1. Preparation and Prerequisites
Before attempting to flash any custom software, you must meet these non-negotiable requirements: Enable Developer Options : Navigate to About Phone and tap the Build Number 7 times. Then, go to Additional Settings Developer Options Enable OEM Unlocking : Inside Developer Options, toggle OEM Unlocking to the "On" position. Backup Everything : Unlocking the bootloader and flashing ROMs wipes all user data Hardware Check
: Ensure your device is at least 60% charged to prevent power failure during the flashing process. 2. The Bootloader Challenge
Unlocking the bootloader is the hardest step for Oppo devices. OPPO Care: Forgot your password? Reset it with ease
The Reality of Custom ROMs for the Oppo A9 (2020) If you are looking to revitalize your Oppo A9 (2020)
) with a custom ROM like LineageOS or Pixel Experience, you need to be aware of a significant technical hurdle. While the hardware—a Snapdragon 665 with 4GB or 8GB of RAM—is more than capable of running newer versions of Android, Oppo's strict security policies make this process extremely difficult, and for most global users, currently impossible. The Bootloader Bottleneck
The primary reason you won't find a standard "how-to" guide for installing a custom ROM on this device is the locked bootloader.
Official Policy: Oppo generally does not provide official bootloader unlock codes for its global A-series devices.
Security Restrictions: Unlike brands like Xiaomi or OnePlus, Oppo has blocked the standard fastboot oem unlock commands on global variants to protect system integrity and user data.
Regional Exceptions: Only specific Chinese variants sometimes have access to the "Deep Test" apk, which allows for an official unlock. Current State of Development
Because the bootloader cannot be easily unlocked, the development community for the Oppo A9 (2020) is limited. Custom Recovery: While some tutorials mention TWRP for the
, these typically require root access or an already unlocked bootloader to function. Without those, you cannot flash a custom recovery.
Available ROMs: Major projects like LineageOS and Pixel Experience do not officially support the Oppo A9 (2020)
. Any ROMs found on forums are often "unofficial" or "Generic System Images" (GSIs), which are prone to bugs with the camera, fingerprint sensor, or network stability. What You Can Do Instead
Since a full custom ROM may not be an option, here are ways to improve your device's performance: Home - PixelExperience
Breathing New Life into the Oppo A9: A Guide to Custom ROMs The Oppo A9 (2020), while a solid budget performer in its prime, has officially reached the end of its manufacturer support cycle. For many users, this means being stuck on older versions like ColorOS 11 based on Android 11. If you’re looking to boost performance, eliminate bloatware, or access newer Android features, a custom ROM is your best path forward. Why Consider a Custom ROM for the Oppo A9?
Custom ROMs replace the factory-installed ColorOS with a community-developed version of Android. For the Oppo A9, this offers several benefits: Performance Boost
: Removing the heavy ColorOS skin can make the Snapdragon 665 processor feel much snappier. Latest Android Features
: While official support has stopped, community developers often port newer versions of Android to older hardware. Privacy & Control
: ROMs often come without pre-installed "bloatware" apps that can track data or consume background battery. Top Custom ROM Options
While specific "official" builds for the A9 2020 can be rare due to Oppo’s historically locked ecosystems, several community-driven projects are popular: Oppo locks its bootloaders aggressively
Critical Warning Before You Read:
The Oppo A9 (model code CPH1938 / CPH1939) has a MediaTek Helio P70 processor. MediaTek chips are notoriously difficult for custom development due to locked bootloaders and lack of source code. Unlike a Xiaomi or OnePlus, installing a custom ROM on an Oppo A9 is extremely risky, often impossible, and not recommended for beginners.
Most online "Custom ROM" links for this device are scams or malware. However, here is the reality of what exists and how it performs.
At 25%, he yanked the cable. He didn't want to boot into the system—that was broken. He needed to boot into Recovery Mode.
He held the Power button and the Volume Down button. The screen flashed black, then the Oppo logo appeared. He let go.
The screen shifted. A team of little penguins marched across the top of the screen—the Linux kernel booting up. Then, the screen lit up with the distinct, slightly jagged text of a custom interface.
Team Win Recovery Project.
He was safe. He was in the recovery environment. The phone wasn't dead; he just had a bad flash.
Elias connected the phone to his PC. He realized his mistake immediately. He had flashed the ROM, but he hadn't wiped the old system cache. The two operating systems were fighting for dominance.
He navigated the touch screen with shaky fingers. Wipe > Advanced Wipe. Check: Dalvik / ART Cache, System, Data, Cache. Swipe to Wipe.
The log scrolled down the side of the screen. The phone vibrated. It was a clean slate.
He re-transferred the ROM file. This time, he took a deep breath. Install > Select Storage > Select Zip. Swipe to Confirm Flash.
This time,
Installing a custom ROM on an older device like the Oppo A9 (2020) Go to product viewer dialog for this item.
can breathe new life into it by offering features and performance enhancements that the original ColorOS might lack.
However, it is important to note that Oppo devices are notoriously difficult to "mod" because the company often blocks bootloader unlocking, which is a required first step for any custom ROM installation. Key Benefits of Custom ROMs for Oppo A9
If you manage to unlock the bootloader (often requiring specific regional tools or unofficial exploits), these are the top features you can expect:
Installing a custom ROM on an (such as the ) is a multi-step process that requires unlocking the device's bootloader—a step that can be difficult on many Oppo models due to manufacturer restrictions [22]. This process will completely erase all data
on your phone and may void your warranty. Proceed at your own risk. Phase 1: Prerequisites Backup Everything
: Sync photos, contacts, and files to the cloud or a PC, as your device will be factory reset [7]. Battery Check : Ensure your phone has at least 60% charge to prevent it from dying mid-flash [7]. Tools for PC : Download and install the latest Android SDK Platform-Tools (ADB and Fastboot) for your computer [14]. : Install the Oppo USB drivers so your computer can recognize the device [10]. Phase 2: Unlocking the Bootloader
The bootloader must be unlocked to allow any modifications to the system [14]. Enable Developer Options Settings > About Phone Build Number 7 times [10]. Toggle Settings Settings > Developer Options OEM Unlocking USB Debugging Boot to Fastboot : Connect your phone to the PC. In a command window, type adb reboot bootloader Unlock Command fastboot oem unlock fastboot flashing unlock
If Oppo has locked your specific model's bootloader, you may need to find a community-specific exploit on the XDA Forums Phase 3: Installing Custom Recovery (TWRP)
A custom recovery allows you to "wipe" the old OS and "flash" the new one [15]. Download TWRP : Find the official or stable TWRP file specifically for your Oppo A9 model (e.g., Flash Recovery : In fastboot mode, run: fastboot flash recovery twrp.img Boot to Recovery : Immediately hold Volume Up + Power fastboot boot twrp.img ) to enter TWRP [7]. Phase 4: Flashing the Custom ROM Wipe the System : In TWRP, go to Wipe > Advanced Wipe Dalvik/ART Cache, System, Data, and Cache wipe "Internal Storage" if your ROM file is saved there. Install ROM and select your downloaded ROM Swipe to confirm the flash. Install GApps (Optional) : If your ROM doesn't include Google services, flash the GApps .zip immediately after the ROM [7]. Reboot > System . The first boot can take up to 15 minutes [7]. Phase 5: Creating Your Own ROM (Advanced) If you intended to a ROM from scratch rather than just install one: Environment
: Set up a Linux build environment with at least 250GB of disk space [5.1]. Source Code
to sync the Android Open Source Project (AOSP) or LineageOS source code [23]. command to select your device target and ) to compile the firmware [23]. Do you need help finding a specific Custom ROM
(like LineageOS or Pixel Experience) that is compatible with your exact Oppo A9 model number? Warning: Unlocking the bootloader on an Oppo A9
Custom ROM development for the Go to product viewer dialog for this item.
(specifically the 2020 model) is restricted compared to other devices due to Oppo's strict bootloader policies. While some unofficial projects exist, the process is technically demanding and carries a high risk of bricking the device. Critical Bootloader Status
Unlocking the bootloader is the mandatory first step for any custom ROM installation, but it is currently difficult for this model:
Official Support: Oppo has largely removed official methods for bootloader unlocking on modern A-series devices. Even if "OEM Unlocking" is enabled in Developer Options, it does not guarantee the bootloader can be successfully opened. Deep Test Limitation:
Most Oppo/Realme devices require an official "In-depth Test" APK to authorize unlocking. Users report that the Go to product viewer dialog for this item. is often not supported by these official tools.
Permanent Locks: Recent firmware updates (versions ending in .500+) may permanently lock the bootloader via "fuse-blowing" updates, making future unlocking impossible. Custom ROMs and Recoveries
Due to the bootloader restrictions, the development community for the
Available ROMs: Projects like Project Elixir and Pixel Experience are popular for other devices to provide a "stock Android" look, but official builds for the
are rare. Most available options are "unofficial ports" found on community forums like XDA Developers .
Custom Recovery (TWRP): An unofficial TWRP (Team Win Recovery Project) exists for some variants, but flashing it typically requires using alternative tools like MTKClient if standard fastboot is disabled. Installation Prerequisites
If you find a compatible ROM, the standard preparation includes: custom ROM - XDA Developers * Claude. * AI Tools. * Entertainment.
Custom ROM development for the Go to product viewer dialog for this item.
(specifically the popular 2020 model) is highly restricted due to Oppo’s strict bootloader locking policies. While the device features capable hardware like the Snapdragon 665, the lack of an official bootloader unlock method has significantly stunted the third-party developer community compared to brands like Xiaomi or OnePlus. The Bootloader Challenge The primary hurdle for installing any custom ROM on the
is the locked bootloader. Unlike many other manufacturers, Oppo does not provide an official tool or code to unlock it.
Official Stance: Oppo has generally moved toward making bootloader unlocking nearly impossible on modern devices to maintain system integrity and security.
Developer Support: Because developers cannot easily access the device's partitions, there is very little official support on platforms like XDA Forums for this specific model. Potential ROM Options (Experimental)
If you manage to bypass the bootloader restrictions via unofficial third-party tools, you might find limited, often unofficial ports. However, most users will find that traditional custom ROMs like LineageOS do not officially support the Oppo A9 2020
Project AfterLife: This is a unique custom ROM based on Android 13 known for its distinct user interface and themed dialers.
Generic System Images (GSIs): For devices with difficult bootloaders but Project Treble support, GSIs are sometimes the only way to experience "stock" Android. These are generic builds of AOSP that can theoretically run on any Treble-enabled hardware. Risks and Considerations
Permanence: Some reports suggest that recent updates may permanently lock the bootloader, removing even unofficial bypass methods.
Stability: Unofficial ROMs for this device often suffer from bugs in critical hardware components, such as the camera or fingerprint sensor.
Security: Unlocking the bootloader through unofficial means can expose the device to security risks and will void your warranty. Standard Stock Firmware
For most users, staying on the official ColorOS (upgradable to Android 10) is the most stable experience. If your device is running slowly, experts suggest clearing the cache and managing background apps rather than attempting a risky ROM installation. How To speed up your phone - OPPO Care
I understand you're looking for a guide on custom ROMs for the Oppo A9. However, I need to give you an important heads-up first: Oppo devices (especially A-series) are notoriously difficult to mod due to their locked bootloaders and MediaTek chipsets (MT6765/P35 for the A9).
For most Oppo A9 models (CPH1938, CPH1939, etc.), there is no stable custom ROM available (no LineageOS, Pixel Experience, etc.). Attempting to force one often results in a hard brick.
That said, here is a general guide on what you would need if a ROM existed, plus a realistic alternative.
Unofficial builds of Pixel Experience existed to replicate the Google Pixel UI.