HomeHuawei Firmware Download Huawei E5220s-2 firmware 21.143.15.00.143 MTS Russia GSM Solutions 18 March Download Huawei E5220s-2 firmware 21.143.15.00.143 MTS Russia Firmware Details File size: 29.29 MB Version: 21.143.15.00.143 Operator: MTS Russia Operating systems: Windows 7/8/10/XP/Vista Download