HomeHuawei Firmware Download firmware Huawei E5220s-2 update 21.143.05.01.21 H3G UK GSM Solutions 04 March Download firmware Huawei E5220s-2 update 21.143.05.01.21 H3G UK Firmware Details File size: 18.07 MB Version: 21.143.05.01.21 Operator: H3G UK Operating systems: Windows 7/8/10/XP/Vista Download