Extract Huawei E392u-12 Firmware 11.433.31.00.990 on your computer
Install the Firmware update file for Huawei E392u-12 downloaded from Huaweiflashfiles.com
Follow the procedure for updating Firmware that is given in Package.

Huawei Flash File | Size: 14.39 MB
Version: 11.433.31.00.990
Operator:OM Sweden
Operating systems: Windows 7/8/10/XP/Vista
Huawei E392u-12 Firmware Download