SM-A300G Heribatubara Monday 27 February 2017 Instructions Extract (unzip) the firmware file Download Odin Extract Odin ZIP file Open Odin Tool Reboot Phone in Download Mode (press and hold Home + Power + Volume Down buttons) Connect phone and wait until you get a blue sign in Odin Add the firmware file to AP / PDA Make sure re-partition is NOT ticked Click the start button, sit back and wait few minutes SM-A300GDXU1AOA4_OLC1AOA1 SM-A300GXXS1BPL1_OLC1BPF1_5.0.2