Original firmware: Our firmware is 100% authentic and is officially released by Oppo Mobility LLC. Backup: We recommend you to take a backup of your personal data from the device, as flashing or installing the ROM using the Flash Tool will permanently delete your personal data from the device. Once your device is rebooted into the recovery mode, Flash the update.zip package.
Power off the device and Reboot into the Recovery menu.Disconnect your device from the computer.Once Your device is connected to the computer, Copy the zip package to the Phone SD memory.After installing the USB Driver on the Computer, Connect your device to the computer.Install the Provided USB driver on the computer.Once you have extracted the Stock ROM package, you will be able to get the Firmware, USB Driver, Flash Tool, How-to Flash Guide.Download and Extract the Oppo A57 CPH1701 Stock ROM Package on the Computer.
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