Samsung S3 I9300 Unlock done.... 
Selected model: I9300
Selected port: COM15 Z3X BOX Serial Port
Selected port speed: 115200
Waiting ADB device... OK
Reading phone info...
Model: GT-I9300
Android version: 4.1.2
Product code: GT-I9300XXXH3G
Phone version: I9300NELK2
PDA version: I9300XXEMD2
CSC version: I9300H3GEMD1
IMEI: 354793053065571
Phone S/N: RF1CAE8DYDL
Checking Super user right... false
Rooting phone, please wait... OK
Checking Super user right... true
Reading nv data... OK
Checking magic... OK
Unlocking... OK
Rebooting phone... OK
Unlock done
Done with Samsung Tool v.19.1