Download Android ICS 4.0.3 Stock Firmware for Huawei Ascend G606-T00 smartphone from here or here. Download previous firmware from here. Download another Huawei firmware from here.
Archive name: HUAWEI_G606_4.0.3_ROM_20160623
Archive file size: 179 MB
Model: Huawei Ascend G606-T00 smartphone
Platform: MediaTek MT6577
Build number: G606-T00-user 4.0.3 HUAWEIG606-T00 C01B065 release-keys
Caution: Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data.