Choose "Install from storage device" Oppo Support. Select SD Card: Choose "From SD card" . Locate Firmware: Find the .ozip file you copied earlier.
It is highly recommended to select and confirm it. This clears out old system caches that could cause lag or app crashes on your fresh software version. Return to the main menu and tap Reboot . flash oppo a57 via sd card work
On the Recovery screen, select . Choose Install from SD , then locate the firmware .zip file you moved earlier. Tap it and confirm by selecting Yes . Choose "Install from storage device" Oppo Support
The SD card method works only for soft bricks. If your phone shows: select . Choose Install from SD