Hold simultaneously while plugging in the USB cable to enter EDL mode.
How to Convert Your OPPO A57 from China to Global Firmware (Complete Guide) Have you ever imported an oppo a57 china to global firmware
: Once the device is connected and the firmware is loaded, the tool writes the necessary files to the device, a process that typically takes about 10 minutes. Key Technical Details Model Codes : The standard global variant for the older is Hold simultaneously while plugging in the USB cable