Huawei GR5 (KII-L21) Stock Firmware

Build: KII-L21C464B330CUSTC464D001
Size: 1.24GB
Type: OTA-MF
dl times: 950

New software version update is available for your device. HOTA upgrade from KII-L21C02B131CUSTC02D002 to KII-L21C464B330CUSTC464D001 The new version removes unwanted language options. Recommend to upgrade to the latest version for better experience. Performance improvement fixes, Latest google security patches. Send SMS optimization done. Timezone change : Turkey stopped following the Daylight Saving Time, so the timezone will be GMT+3. Adds a feature to prioritize emails. Adds more years to the perpetual calendar. Adds Local calendar and Global holidays in Calendar. Adds a feature to add and share contacts using QR code. Adds a feature to share notes as text, image, or email in Notepad. [Optimizations] Optimizes email login by configuring parameters automatically. Optimizes the Themes icon to be more consistent with the system. Recommended to upgrade using WIFI and make sure that the remaining power is greater than 50%. We recommend you to back up important data before upgrade. This version can roll back to old version. Please go to Huawei service outlets to seek help and guidance, and the rollback will clear user data so backup is recommended. If you have third-party application having control over root permission or have uninstalled system files, it will lead to an online upgrade fail. If you encounter such a situation, it is recommended to upgrade via SD card, you can also go to Huawei service outlets for support.

Full Guide on How to Install Stock Firmware on Huawei GR5 KII-L21

Pre-Requisite :

This Guide is only for Huawei users.

You need MicroSD Card or internal memory space to try any Huawei Stock ROM

A Micro SD card of 8GB or more should be available. It is recommended that The Micro SD card is made by ADATA, Silicon Power, Hp, Sandisk, Kingstone, or Kingmax.

Make sure you have enough battery to run the upgrade process. It is recommended that the power of the battery is more than 40%.

Upgrade operations may erase all your user data. So if there is some important information, you should backup them before the upgrade.

Before flashing, you should unzip the SDupdate_Package.tar.gzfile, and get out UPDATE.APP to do upgrade operation on your SD Card. To unzip, we may sometime share two zip file, Update.zip package always comes with the main update.app which is a complete OS. Where has data file comes with data files from Huawei? Check the below file list.

First of all, Download the Update Package
Recommended: Format the Micro SD card (This operation is optional).
Now Unzip the Update.zip package and
Copy the entire dload folder (with UPDATE.APP in it) to the root directory of the Micro SD card.
Now on your phone, Open the dialer and call ->enter: *#*#2846579#*#* ->ProjectMenu->Software Upgrade->SDCard Upgrade->OK,
Now select the Update.app that you moved to SD Card (root directory).
Now you will see a screen which shows the installation process.
Wait until the installation process completes.
When the progress bar stop, the phone will restart automatically
In case if you have the Data File and you want to flash it, then, first of all, delete the earlier moved update.app from the dload folder
then you can extract the second file (update_data_Xxxxx) from above and move the new update.app to the dload folder.
repeat the same 4-8 Steps above.
That's it! You have Installed Stock Firmware on Huawei Smartphone.