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Oppo A3s CPH1853 Flash File

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Full Specifications

Oppo A3s CPH1853 Flash File

Description

Official stock firmware flash file for Oppo A3s CPH1853 from RomWala. Fix bootloop, hang on logo, dead issues, FRP lock, pattern unlock, and software errors. Based on Android 8/9/10 with ColorOS 8/9/10. Flash using MSM Download Tool with authorized account. Direct download links below.

Info Flash File

Firmware Version	CPH1853: A.39 / A.36 / A.31 / A.29 / A.23
Package Name	CPH1853EX-11-A.39-201227-653a8ae6
File Size	~4.5 GB to 5.5 GB (extracted)
System	Android 8/9/10 (ColorOS 8/9/10)
Security Patch Level	2019-06-01 to 2020-12-01
Release Date	June 2019 - December 2020
Flash Tools	MSM Download Tool, QPST (Authorized account required)
Compression	ZIP/RAR
Firmware Type	Stock Firmware
Purpose	Fix bootloop, Hang on logo, Dead issue fix, FRP bypass, Pattern unlock, Software errors, Upgrade/Downgrade

Device Info

Device Name	Oppo A3s
Brand	Oppo
Model	CPH1853
Other Names	CPH1853 (Global)
Year Released	2018
Network	2G, 3G, 4G
SIM	Dual SIM (Nano-SIM)
Dimensions	~156.2 x 75.6 x 8.2 mm
Weight	~170 grams
Build	Glass front, Plastic back, Plastic frame
Display	6.2 inches LCD, 60Hz, 720 x 1520 pixels
Chipset	Qualcomm Snapdragon 450 (14 nm)
CPU	Octa-core (8x1.8 GHz Cortex-A53)
GPU	Adreno 506
RAM Options	2GB / 3GB LPDDR3
Storage Options	16GB / 32GB eMMC 5.1
Expandable Storage	Dedicated SD card slot
Battery Capacity	4230mAh non-removable
Charging Support	Fast charging
OS	Android 8/9/10 (ColorOS 8/9/10)
Rear Camera	13MP (f/2.2) + 2MP (f/2.4)
Front Camera	8MP (f/2.4)
Fingerprint	No
Features	4G connectivity, 60Hz display, SD card support
Network Support	4G LTE, Dual SIM
Firmware Type	Stock Firmware

Available Versions

Version A.39	File Name: CPH1853EX_11_A.39_201227_653a8ae6 Package Name: CPH1853EX-11-A.39-201227-653a8ae6 Region: EX OS: Android 10 (ColorOS 10)
Version A.36	File Name: CPH1853EX_11_A.36_200617_653a8ae6 Package Name: CPH1853EX-11-A.36-200617-653a8ae6 Region: EX OS: Android 10 (ColorOS 10)
Version A.31	File Name: CPH1853EX_11_A.31_200229_653a8ae6 Package Name: CPH1853EX-11-A.31-200229-653a8ae6 Region: EX OS: Android 9 (ColorOS 9)
Version A.29	File Name: CPH1853EX_11_A.29_191205_653a8ae6 Package Name: CPH1853EX-11-A.29-191205-653a8ae6 Region: EX OS: Android 9 (ColorOS 9)
Version A.23	File Name: CPH1853_11_A.23_190624_06b54ae9 Package Name: CPH1853-11-A.23-190624-06b54ae9 Region: Export OS: Android 8 (ColorOS 8)

Pre-requisites

Requirement 1	Battery should be charged up to 70% minimum
Requirement 2	Make sure you have Oppo USB OG Cable
Requirement 3	Download and install MSM Download Tool on PC
Requirement 4	Download and install Qualcomm USB drivers on your computer
Requirement 5	Take a complete backup before flashing
Requirement 6	Knowledge of flashing (professionals recommended)
Requirement 7	⚠️ Authorized Oppo service account required for flashing

Advantages of Stock ROM

Advantage 1	Flash Stock ROM to unbrick your Oppo A3s
Advantage 2	Flash Stock ROM to fix the boot loop problem
Advantage 3	Upgrade And Downgrade Oppo A3s
Advantage 4	Unroot and fix bugs on your phone
Advantage 5	To fix the lag or Stutter on your Oppo A3s
Advantage 6	By flashing Stock ROM, you can solve software problems
Advantage 7	Revert back to Stock to gain your warranty

How to Flash

Step 1	Download the firmware & extract it to get .ofp file
Step 2	Download and install Qualcomm USB drivers on your computer. If already installed, skip this step
Step 3	Extract and open MSM Download Tool on your PC
Step 4	Login with authorized Oppo service account (required)
Step 5	Load the firmware file from the extracted folder
Step 6	Click on Start All / Flash button in the tool
Step 7	Power off the device completely
Step 8	Press and hold both Volume Up + Volume Down buttons
Step 9	Connect your device to PC via USB cable while holding buttons
Step 10	Wait for the tool to detect and flash your device automatically
Step 11	Wait till process completed - Device Ready - Done

Important Notes

Note 1	⚠️ Do flash or unlock at your risk - we are not responsible if you made any mistake and device got bricked
Note 2	Read all flashing instructions carefully before doing flash or unlock
Note 3	Check device version by dial code *#899# in emergency dial
Note 4	If device not detected, reinstall Qualcomm USB drivers
Note 5	Use only on Oppo A3s CPH1853
Note 6	All data will be erased - backup important files before flashing
Note 7	Do not disconnect USB cable during flashing process
Note 8	⚠️ Authorized Oppo service account required to flash this device

Flashing Guide

Requirements	Windows PC, USB Data Cable, 70% battery, Qualcomm USB Drivers, MSM Download Tool, Authorized Oppo account
How to Flash	1. Install drivers. 2. Login with authorized account. 3. Load firmware in MSM Download Tool. 4. Click Start All. 5. Power off device. 6. Press Volume Up + Down. 7. Connect to PC. 8. Wait for completion.
Warnings	Use only on Oppo A3s CPH1853. Do not disconnect during flashing. All data erased. Operations at your own risk.
Troubleshooting	Device not detected - reinstall Qualcomm drivers. Auth error - use authorized account. Flash error - use latest tool version.