Extract Huawei E8259s-2 Firmware 21.138.99.06.00 on your computer
Install the Firmware update file for Huawei E8259s-2 downloaded from Huaweiflashfiles.com
Follow the procedure for updating Firmware that is given in Package.

Huawei Flash File | Size: 11.04 MB
Version: 21.138.99.06.00
Operator:Universal
Operating systems: Windows 7/8/10/XP/Vista
Huawei E8259s-2 Firmware Download