HUAWEI GR5 KII-L21 Firmware


I rooted my Mobile Device to test something in WhatsApp, tried bypass maximum members limit in a group, but the method didn’t work anymore.

But programs of my bank stopped working, they were disabled to work in rooted mobiles, I Unrooted Mobile but footprints of root were still existed and the bank program didn’t work.

I had to reinstall the entire Firmware, after hours of searching, I found how to do it, I’d like to share my experience to save time from anyone trying to do so.

This method essentially doesn’t require a rooted device and the Firmware only applicable to HUAWEI GR5 Firmware KII-L21

This will erase all data and apps and reset the phone’s software to the Firmware we use.

  1. Download the official Firmware (1.5 GB) from this link!AjCoo32OvSxQlh7imzrmUmeLCjv3
  2. Extract the file and put file UPDATE.APP in SD card in this path SD_CARD/dload/UPDATE.APP
  3. Input this code in the phone’s dialer *#*#2846579#*#* and choose Software Upgrade
  4. Phone restarts and install the new Firmware.

Congratulations, your phone is new.

After setting phone configuration, Update your phone
go to Settings -> Update, this will update Phone Firmware from KII-L21_C185B321CUSTC185D001 to KII-L21_C185B321CUSTC185D002

One response to “HUAWEI GR5 KII-L21 Firmware”

  1. Thanks alot my bro,
    your link help me too much to restore my old smartphone GR5 after software crashed.

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