Download Android ICS 4.0.3 Stock Firmware for Huawei Ascend Y200T T8620 smartphone from here or here. Download another Huawei firmware from here.
Archive name: HUAWEI_T8620_4.0.3_160426
Archive file size: 212 MB
Model: Huawei Ascend Y200T T8620smartphone
Platform: MediaTek MT6515
Build number: T8620-user 4.0.3 HuaweiT8620 C01B925 ota-rel-keys,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.