Samsung firmware GT-S5660 / Galaxy Gio GT-S5660 26
5. Reboot Samsung phone in Download Mode (hold Home + Power + Volume Down buttons / hold Volume Down + Bixby buttons then plug-in cable) 6. Connect you Samsung phone and wait until you get a blue sign in Odin. 7. Add the 1 file Samsung firmware to AP/PDA or 4 files Samsung firmware (AP/BL/CP/CSC) to it's slots. 8.