Extract Huawei E392u-12 Firmware 11.335.31.01.07 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: 11.72 MB
Version: 11.335.31.01.07
Operator:Telia Sweden
Operating systems: Windows 7/8/10/XP/Vista
Huawei E392u-12 Firmware Download