Extract Huawei E392u-12 Firmware 11.433.19.10.78 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: 12.42 MB
Version: 11.433.19.10.78
Operator:T-Mobile Hungary
Operating systems: Windows 7/8/10/XP/Vista
Huawei E392u-12 Firmware Download