MicroSD Card: You need a high-quality SD card with at least 4GB of free space.
Create a new folder in the root directory of the SD card and name it exactly dload (all lowercase). huawei cun-l21 flash file sd card
How to Use the Huawei CUN-L21 Flash File via SD Card to Unbrick Your Device MicroSD Card: You need a high-quality SD card
There are two ways to trigger the update depending on whether your phone can still turn on. Method A: The Three-Button Combo (For Boot Loops) Turn off your device completely. huawei cun-l21 flash file sd card
Once finished, the phone will display a "Success" message and reboot automatically.