Extract Huawei E303Cs-6 firmware 21.157.01.01.149 on your computer
Install the firmware update file for Huawei E303Cs-6 downloaded from Huaweiflashfiles.com
Follow the procedure for updating firmware that is given in Package.

Huawei Flash File | Size: 8.13 Mo
Version: 21.157.01.01.149
Operator: Vivo Brazil
Operating systems: Windows 7/8/10/XP/Vista
Huawei E303Cs-6 Firmware Download