HomeHuawei Firmware Download Huawei E5220s-81 Firmware 21.143.13.00.00 Universal GSM Solutions 18 March Download Huawei E5220s-81 firmware 21.143.13.00.00 Universal Firmware Details File size: 50.11 MB Version: 21.143.11.00.00 Operator: Universal Operating systems: Windows 7/8/10/XP/Vista Download