YAL-L21 C10 - Russia (Europe) Firmware [Download]
YAL-L21 C185 - MIDDLE EAST and AFRICA Firmware [Download]
YAL-L21 C431 - Firmware [Download]
YAL-L21 C432 - EUROPE Firmware [Download]
YAL-L21 C461 - MAS, hw / eac, Europe (others) Firmware [Download]
YAL-L21 C605 - PANAMA / GUATEMALA / COLUMBIA / LATIN AMERICA Firmware [Download]
YAL-L21 C636 - SPCSEAS (Asia Pacific) Firmware [Download]
YAL-L21 C891 - Firmware [Download]