Oppo A3s CPH1803 (Qualcomm) 100% Tested Firmware Free Download ✅ 2025

 Oppo A3s CPH1803 (Android 8.1.0) CPU Qualcomm Fix Flash File 


Introduction 💯 ✅ 

Do you have an Oppo A3s (CPH1803) Android phone that has Software problems?
Your phone might be stuck on the Oppo logo,auto-restarting, or going into recovery mode by itself.
You may have already tried many files or methods, but your Oppo A3s is still not fixed.

In this post, I will share a tested firmware.After flashing this firmware, all software problems on your Oppo A3s (CPH1803) will be 100% solved.

I will Also Give you a step by Step Guide on how to do it.


Device information ℹ️

Brand: Oppo 

Mobile Name: Oppo A3s

Model number: CPH1803

CPU Type: Qualcomm / Sanpdragan 



Software Issues Oppo A3s 😭

Hang On Oppo Logo

Auto Recovery Mode 

Auto Restarting 

Playstore Not Open 

Gmail id not Login 

System apps Crashed 

Storage Full 

WiFi & Bluetooth Not Open 

Hotspot Not Open

Dead After Flash Only Qualcomm 9008 Port Showing in Device Manager 

WhatsApp Not working 

Password Pattern + FRP 

Requirements for Flashing ✅ 

Windows Computer Or Laptop 💻 

Oppo A3s CPH1803 firmware 

Download & Install 7zip for Extracting Firmware 

Install Qualcomm Usb Driver 

Use Original USB Data Cable 

Unlock Tool for Flashing ✅ 

Support Flash Tools 💯 

Unlock Tool (Recommended)

UMT Qcfire Latest 

EME Tool

Best Flash Tool 

Hydra Tool 

Chimera Tool 

AMT Tool

EFT Pro 

Other Official Mobile Software Tools.

How To Flash CPH1803 Phone 📱 

1. Download firmware for Oppo A3s Phone 

2. Off Real Protection before Flashing 

3. After Successful Download ✅ firmware 

4. Extract firmware on Your Computer 

5. After Successful Extract Oppo A3s firmware 

6. Now Open Unlock Tool Or Other Official Mobile Software Tool & Go To Qualcomm Tab

7. Click On Load Oppo A3s cph1803 firmware from Your Computer Or Laptop 💻 Where You Extract it

8. After Successful Load firmware 

Untick No: 3 👉 Modemst1
Untick No:  4 👉 Modemst2
Untick No: 20 👉 fsg

9. Than Click on Start Flash Button 🔘 

10. Once You Click flash Button 🔘 Flash Tool Say To You Contact Your Phone in EDL Mode

            👉 Waiting for Qualcomm Port 

11. Now Complete 💯 Power Off Oppo a3s

12. Press Volume Down & Power Key for Enter Recovery Mode 

13. When Phone Go To Recovery Mode, than Select English and insert Usb Data Cable and than Press 3 time click on v1.2, when you click 3 time vision 1.2, now Your Oppo A3s successful connect with EDL Mode.



14. Now Flashing Process Start, Don't Disconnect Oppo A3s Mobile Phone from the PC 

15. Once Flashing Process Complete 💯, Oppo A3s Mobile Phone 📱 Automatically Reboot 

16. Now Wait 1st Boot take Some time 3 to 5 Minutes 

17. Once Booting Complete 💯 ✅ Next Next The Phone to Reach home Screen Menu 

18. Congratulations Your Oppo A3s CPH1803 Android Mobile Phone is Complete 💯 Ready for Using Enjoy.


Important Note ✍️ 

Before Flashing Must Backup Your Personal Data. This firmware is Tested Use it it's Safe for Your Own Oppo A3s CPH1803 Android Mobile Phone 📱.




Safe Google Drive Link 🔗: DOWNLOAD

File 🗃️ Size: 2 GB

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