Extract Huawei E3121 Firmware 21.158.13.00.143 on your computer
Install the Firmware update file for Huawei E3121 downloaded from Huaweiflashfiles.com
Follow the procedure for updating Firmware that is given in Package.
Firmware Details:
Huawei Flash File | Size: 15.09 MB
Version: 21.158.13.00.143
Operator:MTS MTC Russia
Operating systems: Windows 7/8/10/XP/Vista
Huawei E3121 Firmware Download