HUAWEI E3131 - New Firmware Upgrade (21.158.00.00.1020.B757) - YouTube
DC-Unlocker - Huawei HiSilicon Firmware Writer 0.0.0.4 is out! (FREE beta test for DC-Unlocker/Rocker/Vygis and Infinity dongle users) -Write firmware and dashboard/Web UI -800+ firmware files added to Support Area for Huawei
Huawei E3131 Telkom Mobile - Fix An Issue - Telkom
Huawei E3131 Vivo firmware update - YouTube
HUAWEI E3131 - New Firmware Upgrade (21.158.00.00.1020.B757) - YouTube
Huawei E3131 detect and unlock guide
Huawei E3131 detect and unlock guide
Huawei E3131 3G USB modem | The Road Less Travelled