Extract Huawei E3276s-150 Firmware 21.260.03.00.436 on your computer
Install the Firmware update file for Huawei E3276s-150 downloaded from Huaweiflashfiles.com
Follow the procedure for updating Firmware that is given in Package.

Huawei Flash File | Size: 14.80 MB
Version: 21.260.03.00.436
Operator:Omantel Oman
Operating systems: Windows 7/8/10/XP/Vista
Huawei E3276s-150 Firmware Download