Oppo A3s CPH1803 Flash File Stock ROM-Flash File {Updated}

Oppo A3S Flash file

The article deals with the information to install or download Oppo A3S CPH1803 Stock Firmware ROM  (flash file). Firmware comes in a zip package, which contains Flash File, Flash Tool, USB Driver, and How-to Flash Manual. The official link is also provided to install the same. The flash file in Android is just like the Operating System in PC which manages hardware and software services for the phone. Flash file is usually referred to as Stock ROM, Firmware or ISO image files.

Oppo A3s CPH1803 Flash File Stock ROM-Flash File {Updated}

What does it mean to Flash a file?

Flashing or downloading a zip file onto your Android device is usually used to install a custom ROM (a customised version of ANDROID) onto your device. The process changes depending on the device. 

Importance of File Flashing

The Stock Firmware (flash file) helps solving  Software related issue, boot loop issue, and IMEI issue and recovers Mobile phones in such cases. Stock firmware can also be used to reinstall the OS on your Mobile Devices.

Flashing Procedure in Oppo A3s

Removal of prevailing Stock Firmware from Oppo a3s device and then replacing it with the same version or any other version can be called as Oppo a3s flashing. Flashing simply means changing the operating system. It can either be done with two methods; one is Recovery mode and the other one is Flash tool.

Flashing through Recovery Mode

Following are the steps to be kept in mind while flashing Oppo a3s via recovery mode:

  • Step 1: The first step requires the installation of a Flash file.
  • Step 2: Move the Firmware to SD card.
  • Step 3: Now remove the Sd card from Oppo a3s and switch off your phone.
  • Step 4: Press down Volume up, power button or volume button, power button together.
  • Step 5: Soon after the logo appears release the buttons.
  • Step 6: Android exclamation mark on the screen will appear. Now, keep holding the power key and volume Up key. Navigate with the Volume key to select wipe data/factory reset option and press the Power button for Oppo a3s android.
  • Step7: Select “yes” with the volume key and confirm it with the power button.
  • Step 8: Select the reboot system now option.
  • Step 9: Insert SD card in your Oppo a3s phone. Go to the recovery mode and select  APPLY update from Sd card option.
  • Step 10: Search the downloaded Firmware file in SD card storage and select on the firmware and install it into Oppo a3s.

Also Read: Samsung J701F Flash File

Oppo A3s CPH1803 Latest Flash File (Firmware)

CPH1803EX_11_A.29_200710Download Now
CPH1803EX_11_A.20_190923_27fe4659Download Now
CPH1803EX_11_A.19_190717_a6eed039Download Now
Oppo A3s Driver.zipDownload Now

Also Read: HTC Desire 826 Flash File

Flashing Through Flash tool

Follow these steps to flash your Oppo a3s with a flash tool

  • Step 1: Install the flash tool, Oppo a3s flash file, and USB drivers in your computer.
  • Step 2: Now install the USB drivers needed for the Oppo a3s.
  • Step 3: Situate the flash tool in your PC.
  • Step 4: Switch off your Oppo a3s device by pressing and holding Volume up, power button or volume down, and power button key.
  • Step5: Connect your device to the computer via USB cable.
  • Step 6: Locate the Oppo  a3s flash in the flash tool.
  • Step7: Click on the download button. Right after clicking download, flashing will start in your Oppo a3 device. The process will take around 10-15 minutes.
  • Step 8: Hang on till flashing is done.
  • Step9: Once the flashing is completed your Oppo a3s will automatically rebooted.
  • Step10: The flashing is done and you can remove your device from the PC.
Download Oppo A3s driverDownload Now


However, Flashing via Flash tool is a cumbersome process as it requires several things to get it done and likewise a lot of time. Also, when you’re adopting this technique to flash your Oppo A3S device, make sure you have created a backup of all the data stored in your phone to prevent data loss.

About Kriti

A student of Journalism from DU who loves to read and write. As a content writer I believe in being Woke and Vocal as to put out issues that are less talked. I believe that words empower minds and souls. I also do some non-journalism stuff such as dance, painting, playing guitar, making videos and watch as many movies as I can!

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