The latest firmware of Huawei GR5 2017 has been released and free download links are available on this page. Firmware of phone does at that stage if the phone is working slow or completely break due to its firmware.
Flashing of the phone does at that stage if the phone is working slow or completely break due to its firmware. There are a few important things that you can use for flashing your mobile.
"How We Can Flash Phone"
If you have all the above things you can easily flash your phone by using a PC or Laptop. The flashing process will reset your phone to its original settings, and you will lose all of the data.
Mobile Name: Huawei GR5 2017
Model Number: BLL-L22
Build Number: BLL-L22C636B384
EMUI Version: 5.0.1
Android Version: 7.0 After Update
Firmware Size: 1.87GB