Extract Huawei E173Cs-1 Firmware 21.157.13.00.910.B757 on your computer
Install the Firmware update file for Huawei E173Cs-1 downloaded from Huaweiflashfiles.com
Follow the procedure for updating Firmware that is given in Package.

Huawei Flash File | Size: 7.05 MB
Version: 21.157.13.00.910.B757
Operator: Airtel
Operating systems: Windows 7/8/10/XP/Vista
Huawei E173Cs-1 Firmware Download