SM-A310F Heribatubara Friday, 23 December 2016 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 Tutorial on Youtube : Here SM-A310F_XXU2APC5_OXA2APC5 SM-A310FXXU1APB7_OXY1APB7_v5.1.1 SM-A310FXXU1AOLE_VFG1AOL2_v5.1.1