Extract Huawei E8278s-602 Firmware 21.261.67.00.778 on your computer
Install the Firmware update file for Huawei E8278s-602 downloaded from Huaweiflashfiles.com
Follow the procedure for updating Firmware that is given in Package.

Huawei Flash File | Size: 47.65 MB
Version: 21.261.67.00.778
Operator: Open Market Russia
Operating systems: Windows 7/8/10/XP/Vista
Huawei E8278s-602 Firmware Download