[Q] help a noob pls

i use the samsung galaxy S3, I HAVE TRIED ALOT OF PROCEDURES BUT I HAVNT BN ABLE TO ROOT MY DEVICE, I HAVE TRIED ODIN, Z4ROOT FRAMAROOT, GINGERBREAK... PLS HELP AM STUCK. ANY IDEAS?
model - gt-i9300
android version - 4.1.2
baseband- i9300xxema5
kernel version- 3.0.31-1287119
build number - JZ054K.I9300XXEMF6