Since the Korean SGS3 3G just came out a few weeks ago, there are not many ROMs available yet.
The LTE version is released today, so same goes for that.
If you go to the first page of this thread there are some links for you to check out.
Also, there is some information regarding the bands and frequencies for both phones here:
http://xdaforums.com/showthread.php?t=1710084
I get my LTE tomorrow so either someone who gets their's today can answer the bands question on that website, or I will tomorrow.
The LTE version is released today, so same goes for that.
If you go to the first page of this thread there are some links for you to check out.
Also, there is some information regarding the bands and frequencies for both phones here:
http://xdaforums.com/showthread.php?t=1710084
I get my LTE tomorrow so either someone who gets their's today can answer the bands question on that website, or I will tomorrow.