Extract Huawei E3276 WebUI 21.263.03.00.78 on your computer
Install the WebUI update file for Huawei E3276 downloaded from Huaweiflashfiles.com
Follow the procedure for updating WebUI that is given in Package.

Huawei Flash File | Size: 14.89 MB
Version: 21.263.03.00.78
Operator:T-Mobile Hungary
Operating systems: Windows 7/8/10/XP/Vista
Huawei E3276 WebUI Download