The firmware file is around 4 3 gb in size. The stock firmware is based on android 8 0 oreo. Remember to require this guide to upgrade or downgrade the firmware at oppo a3s. Now to install custom rom on your oppo a3s go to install zip. The rom is only for oppo a3s which is powered by 1 8 ghz cortex a53 octa core qualcomm sdm450 snapdragon 450.
Oppo Stock ROM is the official Operating System (OS) of your Oppo Device. The Stock ROM can be used to re-install the Operating System (OS), if in case you are facing any Software related issue, bootloop issue, IMEI issue. The Stock ROM can also be used to upgrade or downgrade the Operating System (OS) on your Oppo Devices. Latest Firmware
Firmware / Stock ROM for OPPO A3s ODM (CPH1853) - unbrick, remove lockscreen, pattern lock DOWNLOAD: HOW TO: I. How to update OTA firwmare: 1. Once the download is complete, click on [Show in folder] then look for the software update file. 2. Connect your OPPO phone to your computer, then choose [Transfer Files]. On your computer, a pop-up will show then click on [Open device to view files . 393 183 383 373 385 72 330 364