Extract Huawei E3276 Firmware 21.260.05.00.609 on your computer
Install the Firmware update file for Huawei E3276 downloaded from Huaweiflashfiles.com
Follow the procedure for updating Firmware that is given in Package.

Huawei Flash File | Size: 49.37 MB
Version: 21.260.05.00.609
Operator:Elisa Estonia
Operating systems: Windows 7/8/10/XP/Vista
Huawei E3276 Firmware Download