How to Install Stock Firmware on Oppo A3s – Full Flash Guide With Flash File

The terms ‘operating system’ and ‘firmware’ both refer to the same thing and might be used interchangeably once applied to such devices. The procedure of modifying or replacing the contents of such flash memory is known as flashing.

So the thing is flashing a latest firmware to device can offer you access to smartphone latest features,

If your smartphone stuck on boot logo while startup or keep bootlooping , you'll reflash firmware of such device to induce back it into life once more. In some cases we've bricked our device , Then we are able to bring back the Phone (Unbrick) using the stock firmware anytime.

Firmware flashing will take away viruses, Trozen and all of your stored data,

Make Sure you create Backup Before continuing For Flashing.

You Can update firmware by 2 methodology , one by recovery with OTA or Stock firmware Flashing via Bootloader Port.

In This Guide i'll explain however are you able to Safely Flash Stock rom To Your Oppo A3s.


  • This Guide is For Listed Phone Don’t attempt It With Another Smartphone.

  • Please do it carefully we aren't to blame for any harm to Your Device.

  • Follow All steps carefully.

  • Ensure the battery is charged atleast

Download Below File Into your PC.

Firmware CPH1803EX_11_A.02_180705

Model No.:- Oppo A3s

Type :- Stock Rom

Version: CPH1803EX_11_A.02_180705

Android Version :- Android 8.1

Download Links:-

Mirror 1


Download Tool Guide. Here.


Download Driver Here.

How To Flash . Here.

How To Install Driver. Here.

Leave A Comment If Any Problem With Links Or Tutorial.

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