Press and hold the Power Button and Volume Down Button simultaneously. Release them when the OPPO logo appears. Select Language: Select English. Install from Storage: Select "Install from storage device" .
The OPPO A9 2020 has two regional variants: (India/International) and CPH1939 (Southeast Asia/Europe). You must download the correct package for your model.
Newer OS versions can sometimes be too heavy for the Snapdragon 665 processor .
: Visit the OPPO ROM download page and look for the specific system upgrade tool for your region. oppo a9 2020 rollback package exclusive
However, engaging with this rollback package is fraught with peril, which is why manufacturers do not advertise it. The process typically requires unlocking the bootloader—an act that immediately voids the device’s warranty. Furthermore, the installation procedure involves using a Windows PC, installing specific Qualcomm USB drivers, and executing command-line scripts via a tool like SP Flash Tool or Oppo’s own recovery flasher. A single mistake, such as interrupting the flash process or selecting the wrong scatter file, can corrupt the device’s NAND storage, turning the smartphone into an irreparable "paperweight." Thus, while the package provides a solution for the informed user, it is a high-risk, last-resort measure. For the average consumer, the safer path remains visiting an Oppo service center for a manual downgrade, even if that option is less convenient.
The OPPO A9 2020 rollback package exclusive offers several benefits to users:
The OPPO A9 2020 launched with ColorOS 6 (Android 9) and later received updates to ColorOS 10 (Android 10) and ColorOS 11 (Android 11). While updates bring new features, they sometimes create problems on older hardware like the Snapdragon 665 chipset. Common complaints include: Press and hold the Power Button and Volume
Certain apps may not function correctly on Android 11.
, particularly for downgrading from Android 11 to Android 10, is often region-specific or variant-specific (e.g., CPH1937 for India/Global). It is not available through the standard Software Update menu, requiring manual flashing.
Turn off the phone entirely. Press and hold the Power Button and Volume Down Button simultaneously until the OPPO logo appears on screen. Install from Storage: Select "Install from storage device"
You must use the correct rollback package for your specific region and model number (e.g., CPH1937 for India, CPH1939 for Europe). Using the wrong file can brick your phone . How to Roll Back Your Oppo A9 2020
Finding a legitimate rollback package can be a minefield. Many third-party sites host infected files or incorrect region-specific firmware.
For the OPPO A9 2020, the exclusive ZIP is the way to fix the overheating issue introduced in the June 2023 security patch.