That completely sucks!
So if I buy the t mobile version I can only use it on t mobile. I'm not happy with that.
*swyped from the evo so excuse any typos*
I am not sure it won't but here are the different frequencies for the different versions of Galaxy S3
T-Mobile Version
2G Network GSM 850 / 900 / 1800 / 1900
3G Network HSDPA 850 / 1700 / 1900 / 2100
AT&T Version
2G Network GSM 850 / 900 / 1800 / 1900
3G Network HSDPA 850 / 1900 / 2100
4G Network LTE 700 MHz Class 17 / 2100
International
2G Network GSM 850 / 900 / 1800 / 1900
3G Network HSDPA 850 / 900 / 1900 / 2100