Default [Q] unlock samsung s3 sprint

Hi my friends


can someone help me to unlock samsung s3 sprint 4.3 MK3 for outside USA
the device already rooted and has CWM recovery


i had been flash without any problem for s3 sprint 4.1.1 and 4.1.2 to change the spc to 000000
except the 4.3 i dont know to unlock it
i hear that i should first change the modem first from mk3 but i dont know which modem should i use ?



thank you