Flashing typically wipes internal data; if possible, back up your files first.
Use a reliable MicroSD card with at least 8GB of free space. flash oppo a57 via sd card work
Copy the downloaded firmware .zip file directly into the of the SD card (meaning do not place it inside any folder). Safely eject the card and insert it into your OPPO A57. Step 3: Boot Your OPPO A57 into Recovery Mode Turn your phone completely off. Flashing typically wipes internal data; if possible, back
Before diving into the process, understand why this method is used: When your device hangs on the Oppo logo. Flashing typically wipes internal data
Copy the downloaded firmware .zip file directly to the of your SD card.