Downgrade Firmware
ENG MODEM SM A505U SQU4ATB1 Firmware BY firmware.gem-flash.com
A505USQU5BTD2 A505UOYN5BTD2 USC OS10 Firmware BY firmware.gem-flash.com
A505USQU3ASL6 A505UOYN3ASL6 VZW Firmware BY firmware.gem-flash.com
A505USQU2ASJ2 A505UOYN2ASJ2 USC Firmware BY firmware.gem-flash.com
A505USQU1ASF2 A505UOYN1ASF2 SPR Firmware BY firmware.gem-flash.com
A505USQS5ATB4 A505UOYN5ATB4 USC Firmware BY firmware.gem-flash.com
A505USQS4ATA2 A505UOYN4ATA2 USC Firmware BY firmware.gem-flash.com
A505U W THERMISTOR Firmware BY firmware.gem-flash.com
A505U SCHEMATICS Firmware BY firmware.gem-flash.com