On this page,You will find the official link to download Oppo A16E (CPH2421) strock firmware ROM On your computr.Firmware contains flash file ,Flash Tool,USB Driver And How-To Flash Manual.
File Name: Oppo CPH2421 Pattern & FRP Unlock File
Flash Tools:Download
USB Driver:Download
Step 1:Downlod and extract the Oppo A16E (CPH2421) strock firmware package on your computer.
Step 2:After extracting the package,you will be able to get the Firmware File,Flash Tool,Driver and How_to Flash Guide.
Step 3:Install the provided USB Driver on your computer, and if in case USB Driver is already installed,SKIP this step:
Step 4:Follow the How-to Flash Manual to Flash the Firmware on your Oppo A16E (CPH2421)