Once finished, the phone will usually reboot automatically. The first boot can take up to 10 minutes. Verify the new software version in > About Phone .
: Release the buttons when the Huawei logo or an "Updating" progress bar appears. The update usually takes 5 to 10 minutes to complete. The device will automatically restart once the flash is finished. Important Reminders: Backup Data : This process will erase all data on your phone. Battery Level : Ensure your phone has at least 30-50% battery to prevent it from shutting down mid-flash. Alternative Method : If the SD card method fails, you may need to use the SP Flash Tool on a PC, which requires a scatter-based firmware file. if the SD card method does not work? Huawei Y5II CUN-L21 Stock Firmware ROM (Flash File) huawei cun-l21 flash file sd card
If the three-button method does not work after multiple attempts, consider: Once finished, the phone will usually reboot automatically
💡 Never interrupt the progress bar once it starts, as this can permanently damage the motherboard. If you'd like, I can help you: Find a specific download link for your region Troubleshoot error codes during the flash Explain how to use the SP Flash Tool if the SD card fails How to Update Firmware by Formatting and Flashing SD Cards : Release the buttons when the Huawei logo
: A high-quality card (Sandisk or Kingston recommended) with at least 2GB to 8GB of free space.