Before proceeding, please note that flashing a device can potentially brick it or cause data loss. Ensure you have a backup of your important data and understand the risks involved.

When searching for the flash file, look for reputable mobile repair forums rather than generic download sites.

You're looking for a post on how to flash Huawei TRT-L21A without a password. Here's some information:

: At least 50% to prevent the phone from dying mid-process.

Copy the unzipped file into this newly created dload folder. Turn off your Huawei TRT-L21A completely. Insert the micro SD card into your phone.

Unlocking the Huawei Y7 Prime (TRT-L21A): A Complete Guide to Flashing Without a Password