Extract Huawei E303Fi-1 firmware 22.521.29.00.00 on your computer
Install the firmware update file for Huawei E303Fi-1 downloaded from Huaweiflashfiles.com
Follow the procedure for updating firmware that is given in Package.

Huawei Flash File | Size: 16.7 Mo
Version: 22.521.29.00.00
Operator: Universal
Operating systems: Windows 7/8/10/XP/Vista
Huawei E303Fi-1 Firmware Download