nhờ file smod cuduy..http://vietfones.vn/forum/showthread.php?1109028-G531H-tk-google-ok .flash wa odin,,,dùng z3x reset eff ok lun nek.... (Sometimes needs to perform 'wipe data/factory reset' once more, to complete this locks removal.) Operation: Reset FRP/React/EE Selected model: SM-G531H/DS Software version: 24.3 Searching Samsung USB Flash Interface... detected COM23 Setup connection... OK Reading PIT from phone... OK Searching FRP lock... OK Erasing FRP... OK Searching Reactivation lock... not supported Searching EE lock... OK Erasing EE lock... OK Reset done Done with Samsung Tool PRO v.24.3