| ROM Name | Android Version | What Works? | What Doesn't Work? | | :--- | :--- | :--- | :--- | | | 13 / 14 | WiFi, BT, Calls, Battery | Fingerprint (sometimes), FM Radio | | Cherish OS | 13 | Smooth UI, Audio, Camera | VoLTE might break | | Pixel Experience Plus | 13 | Pixel look, Gestures | DT2W (Double Tap to Wake) | | LineageOS 20 GSI | 13 | Lightweight, Stable | SELinux permissive (not enforcing) | | Evolution X | 13 | Customization | Auto-brightness lag |

: Recent "fuse-blowing" updates (ColorOS versions ending in .500+) are reported to permanently block bootloader unlocking capabilities. The State of Custom ROMs

The thread was dedicated to developing a custom ROM for the Oppo A9 2020, and Alex was excited to see that a few developers had already started working on it. He decided to join the conversation, sharing his device's specs and asking for guidance on how to contribute to the project.

However, the reality of "OPPO A9 2020 custom ROM work" is complex. While the Snapdragon 665 chipset is very capable, OPPO’s strict software restrictions present significant hurdles. The Reality: Why Custom ROMs are Difficult on OPPO A9 2020

Dedicated ROMs are generally not available.

Custom ROMs on the Oppo A9 2020 offer a stellar way to experience modern Android versions, clean user interfaces, and improved system responsiveness. For daily driving, ROMs like Pixel Experience and LineageOS provide excellent stability with working cellular, Wi-Fi, and biometric systems. So long as you are comfortable configuring a GCam port for photography and managing SafetyNet fixes for banking apps, switching to a custom ROM can effectively double the usable lifespan of your device.

Eliminates background background bloatware to free up CPU cycles and available RAM.

In your search for solutions, you may come across websites offering "Oppo A9 2020 TWRP" or "custom ROM downloads." Exercise extreme caution. Many of these are outright scams, malware traps, or generic guides that are not actually compatible and risk bricking your device. A brief but telling search on XDA currently yields a simple response for a custom ROM request: "And no there is nothing for this oppo."

Unlocking Potential: Does a Custom ROM Work on the Oppo A9 2020?

The Oppo A9 2020 is a powerful device on paper, which makes it a good candidate for custom development. Key specifications include a 6.5-inch display, a Qualcomm Snapdragon 665 chipset, options of 4GB or 8GB of RAM, and 128GB of internal storage. The fact that it runs on a Qualcomm chipset is a significant advantage, as this platform generally has better community documentation and tool support for unlocking bootloaders and building custom software than MediaTek alternatives.

Go to Wipe > Advanced Wipe. Select Dalvik/ART Cache, Cache, System, Vendor, and Data. Swipe to wipe. (Do not wipe Internal Storage if your ROM file is saved there).

: While standard rooting is blocked, some advanced users have attempted methods using patched boot images through ADB, though this remains risky and complex. Device Quick Info Processor Snapdragon 665 Max OS ColorOS 11.1 (Android 11) Unlock Status Permanently Locked (for most regions)