While holding the buttons, connect the phone to your PC via the USB cable.
Download the official OTA stock firmware update file package (ending in .zip ). oppo a57 2016 firmware
You will need the along with the firmware file. Oppo A57 Stock Firmware (CPH1701) MSM Download Tool (for Qualcomm devices) Steps to Install/Flash Firmware on Oppo A57 2016 While holding the buttons, connect the phone to
# Linux tool to extract oppo_decrypt.py CPH1701EX_11_A.14_170907.ofp output_dir Oppo A57 Stock Firmware (CPH1701) MSM Download Tool
Removes custom ROMs, root access, and custom recoveries to restore your warranty.
The Oppo A57, released in late 2016, remains a reliable budget device for many users worldwide. Powered by the Qualcomm Snapdragon 435 chipset and running ColorOS based on Android 6.0 (Marshmallow), this smartphone occasionally requires a system refresh. Whether your device is bootlooping, experiencing severe lag, or you simply want to restore it to factory settings, installing the official firmware (Stock ROM) is the ultimate solution.
ColorOS 3.0, based on Android 6.0 (Marshmallow) Why Flash Stock Firmware?