Firmware / Stock ROM for OPPO A3s ODM (CPH1853)

Here you can download the latest official Stock ROM (Firmware) files for the Firmware / OPPO A3s ODM CPH1853. 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

File Type	Firmware / Build	Region / Model	OS Version	Download Link
Stock ROM	CPH1853EX_11_OTA_0380_all_mvHCpUD3KFWh.ozip	Global / General	Android 11	Download
Stock ROM	CPH1853EX_11_OTA_0370_all_1FYQAC47m8Z6.ozip	Global / General	Android 11	Download
Stock ROM	CPH1853EX_11_OTA_0360_all_pCuXM1nBIDuy.ozip	Global / General	Android 11	Download
Stock ROM	CPH1853EX_11_OTA_0340_all_caoQvZHEA4dq.ozip	Global / General	Android 11	Download
Stock ROM	CPH1829EX_11_OTA_0310_all_bgEVqB5YjMUx.ozip	Global / General	Android 11	Download
Stock ROM	CPH1853EX_11_OTA_0290_all_3t6rxrBpXEvP.zip	Global / General	Android 11	Google Drive \| AFH \| DropBox \| Google Drive
Stock ROM	CPH1853EX_11_OTA_0260_all_yeVGHapdKd4f.zip	Global / General	Android 11	Google Drive \| AFH \| DropBox \| Google Drive
Stock ROM	CPH1853EX_11_OTA_0230_all_bufzG5IIseFi.zip	Global / General	Android 11	Google Drive \| AFH \| DropBox \| Google Drive
Stock ROM	CPH1853EX_11_OTA_0210_all_ApAk31CwZHyy.zip	Global / General	Android 11	Google Drive \| AFH \| DropBox \| Google Drive
Stock ROM	CPH1853EX_11_OTA_0180_all_OlU3r4ImvcSX_local.zip	Global / General	Android 11	Google Drive \| AFH \| DropBox \| Google Drive
Stock ROM	653a8ae6	Global / General	Android 11	Google Drive \| AFH \| OneDrive
Stock ROM	653a8ae6	Global / General	Android 11	Google Drive \| AFH \| OneDrive
Stock ROM	653a8ae6	Global / General	Android 11	Google Drive \| AFH \| OneDrive
Stock ROM	653a8ae6	Global / General	Android 11	Google Drive \| AFH \| OneDrive
Stock ROM	06b54ae9	Global / General	Android 11	Google Drive \| AFH \| DropBox \| Google Drive
Stock ROM	QFIL	Global / General	Android 11	Google Drive \| AFH \| DropBox \| Google Drive

Additional Files & Tools

How to Flash Firmware / Stock ROM

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

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