(Official) Stock rom for OPPO A3 (CPH1837) – unbrick, remove lockscreen, pattern lock

Here you can download the latest official Stock ROM (Firmware) files for the Official OPPO A3 CPH1837 – unbrick, remove lockscreen, pattern lock. These files are essential for repairing software issues, fixing bootloops, upgrading/downgrading the OS, or restoring your device to its factory state.

Prerequisites & Preparation

• Backup Data: Flashing will completely wipe all data on your device. Back up important files and settings before proceeding.
• Battery Level: Ensure your device has at least 50% battery to prevent shutdown during the flashing process.
• USB Driver & Tools: Install the correct USB drivers for your brand and prepare the flashing tool (Odin for Samsung, SP Flash Tool/QPST for Qualcomm/MTK, etc.).

CAUTION: Flashing official firmware carries a risk of bricking your device. Proceed with caution and at your own risk. addROM is not responsible for any damage caused to your device.

Download Stock ROM & Firmware

Global / General

Additional Files & Tools

• MT65xx_Preloader.rar
• OPPO_ALL_TOOL.rar

How to Flash Firmware / Stock ROM

To flash the stock firmware on your OPPO device using MSMDownloadTool (DownloadTool), follow these steps:

1. Download and install the OPPO / Realme USB Drivers on your computer.
2. Download and extract the firmware package (which includes the MsmDownloadTool.exe or DownloadTool.exe).
3. Launch MsmDownloadTool.exe as administrator. If prompted, log in with authorized credentials or use an activation tool/bypass.
4. Power off your device completely.
5. Hold the Volume Up and Volume Down buttons, then connect the device to the computer via USB cable.
6. The tool should detect your device. Click the Start button to begin the flashing process.
7. Wait until the progress bar reaches 100% and shows a green “Download Complete” or “Success” status.

Video Guide / Reference