Download and Install Stock ROM On Oppo A3S (CPH1803EX) [Official Firmware]: The stock firmware file name is CPH1803EX_11_A.10_180829_cda88134.zip. The firmware file is around 4.3 GB in size. The stock firmware is based on Android 8.0 Oreo. The ROM is only for Oppo A3S which is powered by 1.8 GHz Cortex-A53 octa-core Qualcomm SDM450 Snapdragon 450
The official Stock Firmware / Flash File of Oppo A3S is now available for download. The Android Version is Android 8.0. You just need to ask for the permission to download the file. We are sharing a step by step guide to install the Oppo A3S Official Firmware. Don’t try to skip any step because every step has it’s own importance in this guide if you don’t follow the guide correctly you may end up bricking your device. We have collected more information about Oppo A3S Stock ROM down if you want you can read it from down.
Android is an open source operating system so there are loads of modified ROMs or firmware commonly known as Custom ROMs are available for Android devices. Users love to root and install these custom ROMs to get more features which were missing from the official firmware. But if the user misses a single step, he/she may brick the android phone and only be installing the stock firmware can restore the device.
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