Oppo A3S CPH1803 Android 8.1 Oreo Stock ROM Firmware [Flash File]

If you’ve been waiting for the latest Android 8.1 Oreo security patch on your Oppo A3S CPH1803, here’s the good news. Those who wanted to install the latest version of the firmware ROM on their device can now be glad that the latest software is flashing on their device.

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Oppo officially has versions 8.1 Oreo and ColorOS 5.1 Custom Skin for Oppo A3S CPH1803 Android 8.1 Oreo is the latest version of Android for the Oppo A3S, and the company only releases safety patches. The official Android firmware comes with various bug fixes, security fixes and improvements to the overall stability of the device.

So, if you have an Oppo A3S CPH1803, you can install the latest update for your unit that has arrived with the latest construction number. CPH1803EX_11_A.32, and is based on Android 8.1 Oreo. Updates are often aimed at improving the stability of the system and the performance of the device and adding new features.

Oppo A3S CPH1803 Android 8.1 Oreo OTA Firmware / Flash file

All owners of Oppo A3S CPH1803 can already be informed about the OTA update on their aircraft. You may already know that from time to time the Android team fixes vulnerabilities in the operating system and publishes timely updates. OEM, click Security updates with Android vulnerabilities fixed/repaired as OTA and ROM updates from stock. When you update your smartphone via the OTA firmware, no data is deleted.

In the manual below, we will guide you step-by-step through the process of flashing/installing the latest version CPH1803EX_11_A.32 Android 8.1 Oreo on the opposite side A3S CPH1803. A download link for this ROM has been added to the Requirements section. You can simply empty the .pac firmware file manually using the MSM download tool if you have not received it via an OTA update.

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ALWAYS reads the installation/update of the Ulefone MIX firmware for Android 7.0 Nougat Stock ROM.

Detailed firmware information:

Android version : Android 8.1 Oreo

Version of the user interface : Coloros 5.1

Firmware Versions : CPH1803EX_11_A.32

A model: Appeal against A3S CPH1803

Suck it: Qualcomm 450 Carabiner

Date of exemption : October 2024

Android safety patch level: October 2024

The land: NA

Status : – Official website


Check the model number of the model you want to use:

You must ensure that you read the disclaimer carefully before updating your phone and that you agree to do so at your own risk.

The phone must be 70% charged, otherwise complications may occur during the tests. Why take the risk? Try charging it.

Additional firmware update for iVOOMi Innelo 1 for Android 8.1.0 Oreo Stock ROM.

When you upgrade your phone to a standard ROM or a custom firmware ROM, it’s a good idea to back up your phone. Back up all your media – photos, videos and more – to your PC and contacts in the cloud.

You need to enable the USB debugging option by going to Settings, Applications, and Developer Options.

Downloads for Oppo A3S CPH1803 Update

Download the latest version of the MSM download tool here.

Download here the CPH1803EX_11_A.32 update for Oppo A3S CPH1803 based on Android 8.1 Oreo.

Download the latest Qualcomm/QDLoader HS USB Driver: 32-bit / 64-bit.

Description Date of exemption Download the file
CPH1803EX_11_A.17 09/02/2019 Download .
CPH1803EX_11_A.18 03/07/2019 Download .
CPH1803EX_11_A.20 29/11/2019 Download .
CPH1803EX_11_A.24 17/01/2020 Download .
CPH1803EX_11_A.25 30/03/2020 Download .
CPH1803EX_11_A.27 27/04/2020 Download .
CPH1803EX_11_A.28 08/06/2020 Download .
CPH1803EX_11_A.29 17/07/2020 Download .
CPH1803EX_11_A.31 28-09-2020 Download .
CPH1803EX_11_A.32 16-10-2020 Download .
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Upgrade of the Oppo A3S CPH1803 to Android 8.1 Oreo via OTA (over-the-air)

Pay attention: This method does not require downloading the files referred to in the introduction to this Article. If you prefer the OTA method, you can perform these steps directly.

You can check the latest firmware/software available for your instrument, Oppo A3S CPH1803, directly by clicking on the link.

Settings > About the device > Software updates

When a new software update is available for your device, a message appears in the notification window. Just scroll down the notification bar and click the software update button, and the process of updating the Oppo A3S CPH1803 to the latest CPH1803EX_11_A.32 based on Android 8.1 Oreo begins.

If you have not received the software update, follow the instructions below to manually flash the firmware (.pac) using one of the manuals below. Whichever method you prefer, OTA is a safer way to upgrade your device. However, if you prefer to update your device manually, simply follow our step-by-step instructions.

ALWAYS Install/update DEXP Z455 firmware for Android 8.1.0 Oreo Stock ROM.

Manual upgrade from Oppo A3S CPH1803 to Android 8.1 Oreo

Step one: The following steps are mandatory provided that you have already downloaded the MSM download tools and the required drivers with the firmware (stock ROM), as mentioned above in the foreword. If you’ve been there before, let’s go to the next step.

Step two: Now extract the archive file from the MSM download tool into a folder and navigate to the same folder. Now start the MSM Download tool from the folder extracted with administrator rights using the Run as administrator option.

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Step three: Assuming you have already downloaded the firmware files, move the firmware file to the same folder as where the MSM download tools were extracted.

Step five: Just turn it off. Then connect the device to your computer by simultaneously pressing the Volume + and Volume – keys.

Step 6 : Your device should now appear in the program interface. As soon as the name of the device appears in the tool, simply click on the Start option, and the firmware of your device will blink immediately.

Step seven: When the camera’s firmware is complete and the download dialog box appears on the screen, it is time to disconnect the camera from the computer and disconnect the USB cable. When the creation of the firmware is complete, the device will restart.

Attention: Never disconnect the USB cable while the phone is in standby or reboot.

Congratulations, you have successfully flashed the CPH1803EX_11_A.32 Android 8.1 Oreo on your Oppo A3S CPH1803. If you experience a problem while flashing, please report it in the comments below.