Download and install official firmware for the Huawei G610-U20 (Ascend G610)
Click Download , power off the phone (remove battery if possible), and connect it to your PC via USB while holding the Volume Down key.
Launch Smartphone Flash Tool and click the Download tab.
Click Scatter-loading and select the .txt scatter file found in your downloaded firmware folder.
You can find various versions of the stock ROM (firmware) on community forums and dedicated firmware repositories:
Create a folder named dload in the root directory of the SD card.
