Extract Huawei E303Ms-2 firmware 21.158.47.00.609 on your computer
Install the firmware update file for Huawei E303Ms-2 downloaded from Huaweiflashfiles.com
Follow the procedure for updating firmware that is given in Package.

Huawei Flash File | Size: 9.84 Mo
Version: 21.158.47.00.609
Operator: Estonia
Operating systems: Windows 7/8/10/XP/Vista
Huawei E303Ms-2 Firmware Download