Extract Huawei E3331s-2 WebUI 12.003.05.01.1072 on your computer
Install the WebUI update file for Huawei E3331s-2 downloaded from Huaweiflashfiles.com
Follow the procedure for updating WebUI that is given in Package.

Huawei Flash File | Size: 8.45 MB
Version: 12.003.05.01.1072
Operator:Open Market Singapore
Operating systems: Windows 7/8/10/XP/Vista
Huawei E3331s-2 WebUI Download