Stock ROMFirmware Update

Install/ Update Oppo A3S CPH1803 to Android 8.1 Oreo Stock ROM Firmware

If you were waiting for the arrival of latest security patch of Android 8.1 Oreo on your Oppo A3S CPH1803, then here is a piece of good news. Those who were wondering to install the latest Stock ROM Firmware on your device, can now rejoice as they can flash the latest software on their device.

Oppo has officially released the Stock Android 8.1 Oreo and ColorOS 5.1 Custom Skin for the Oppo A3S CPH1803. The Android 8.1 Oreo is the last Android build version for Oppo A3S, and only security patches are being released by the company. The Official Android Firmware comes with the various Bug fixes, Security patches, and improve the overall stability of the device.

So, if you own an Oppo A3S CPH1803, you can install the latest update for your device, which comes with latest build no. CPH1803EX_11_A.32, and is based on Android 8.1 Oreo. The update often aims to increase system stability and increase the performance of the device, as well as adding new features.

Oppo A3S CPH1803 Android 8.1 Oreo OTA Firmware/ Flash File

All Oppo A3S CPH1803 owners may already receive the OTA update notification on their device. You might be already aware of the fact that the Android Team fixes the vulnerabilities found in the operating system from time to time, and releases the updates promptly. The OEMs, then push the Security Updates with patched/ fixed Android vulnerabilities in the form of OTA and Stock ROM updates. Updating your smartphone through OTA Firmware update does not delete the data.

In the below guide, we will be guiding you step by step process to flash/ install the latest CPH1803EX_11_A.32 Android 8.1 Oreo on Oppo A3S CPH1803. The download link for this Stock ROM has been added to the pre-requisite section. You can simply flash the Stock Firmware .pac file manually through MSM Download Tool if you have not received it through the OTA update.

Firmware Details:

Android Version: Android 8.1 Oreo

UI Version: ColorOS 5.1

Firmware Versions: CPH1803EX_11_A.32

Model: Oppo A3S CPH1803

SoC: Qualcomm Snapdragon 450

Release Date: October 2020

Android security patch level: October 2020

Country: NA

Status: – Official

Disclaimer: AndroidWeblog.com covers although everything in a very neat and a processed manner so that our readers get exactly what they want, still there are meager chances of basic issues that may arise out of the listed steps here. Hence it is in the sole interest of the user to follow the steps very cautiously to stay away from any mishappenings with your device.

Updating or flashing the Stock ROM firmware or Custom ROM firmware updates certainly without any doubt comes with risk to brick devices. If you brick the device, while upgrading the firmware of your smartphone, then kindly be in touch with the Official Service center of Lenovo near your location. AndroidWeblog.com in no way will be held responsible for warranty void or your bricked device.

Prerequisite

Ensure to check your model number, which must be:

  • Oppo A3S CPH1803

You must have to ensure that before updating your phone, you have read thoroughly the disclaimer and you agree to proceed further on your risk.

  • Phone Should be Charged

Your phone must be 70% charged at least else, it may lead to complications sometimes while experimenting. Why take the risk, try to charge it fully.

  • Back-Up

If you are updating your phone to Stock ROM or Custom ROM firmware, then, it is a good habit to make a back up of your phone. Make a back up of all your media like images, videos and all on your PC and your contacts on Cloud.

  • Enable USB Debugging

You must enable the USB debugging option by going into Settings, Applications and Developer options.

Downloads For updating Oppo A3S CPH1803

Download the Latest Version of the MSM Download Tool from here.

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

Download Latest Qualcomm Drivers/ QDLoader HS USB Driver: 32-bit / 64-bit.

Description Release Date Download 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

How to update Oppo A3S CPH1803 to Android 8.1 Oreo via OTA (Over the air)

Note: For this method, you won’t need to download any file mentioned in the pre-requisite section of this article. You can directly follow the below steps, if you prefer the OTA method.

You can directly check the latest version of firmware/ software available for your device, Oppo A3S CPH1803 by navigating to:

Settings > About Device > Software Updates

When a new software update is available for your device, the notifications panel will display the software update message. Just you need to pull down the notification bar, and then press ‘Software Update’, and this will begin the upgrade process of device Oppo A3S CPH1803 to latest CPH1803EX_11_A.32, based on Android 8.1 Oreo.

If in-case you have not received the software update, then just follow the below guides, to flash firmware (.pac) manually through either below guide. No matter which method you prefer, however, OTA is a safer method to upgrade your device. But in case you prefer upgrading your device manually, then just carefully follow our below guide step by step.

How to Manually update Oppo A3S CPH1803 to Android 8.1 Oreo

Step 1: Below steps are compelled, assuming that you have already downloaded the MSM Download Tools, and the required drivers along with the Firmware (Stock ROM), as mentioned in the prerequisite section above. If you have down so already, then let’s proceed to the next step.

Step 2: Now extract the MSM Download Tool zipped file into a folder, then navigate to the same folder. Now, run the file ‘MSM Download’ tool from the extracted folder with administrator privileges through the ‘Run as administrator’ option.

MSM Download Tool

Step 3: Assuming that you have already downloaded the firmware files, move the firmware file to the same folder where MSM Download Tools was extracted.
Step 5: Now, just turn off the device. Then, connect the device to the computer, while pressing and holding the ‘Volume UP’ and ‘Volume Down’ keys simultaneously.
Step 6: Your device should be displayed now at the software interface. Once the device name shows up in the tool, just click on the option ‘Start’, that will immediately begin flashing the firmware on your device.

Step 7: When firmware flashing on the device gets completed, then, it’s time to disconnect the device from the computer, unplug the USB cable when the ‘Download Complete’ dialog box appears on the screen. The device would reboot once the flashing process gets complete.

Caution: Never unplug/ disconnect the USB Cable while status is ‘Waiting’ or ‘Reset Phone’ is in progress.
Congratulations, you have successfully flashed CPH1803EX_11_A.32 Android 8.1 Oreo on your Oppo A3S CPH1803 device. If you faced any issue while flashing, then do not hesitate to let’s know in the comments section below.

Ramandeep Singh

Meet Ramandeep Singh, the face behind AndroidWeblog.com. The Founder and the Ex-Editor-in-Chief (2011-2013) of the renowned website 'TechClap.com' which was dedicated to providing the most reliable and comprehensive information and analysis related to technology. A passionate and dynamic blogger, he aims to deliver quality content to IT professionals and those who share his passion for Android, technology and gadgets.

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