With the Samsung Galaxy S4 out, it’s only common sense that the older S3 would be pushed out onto prepaid brand Straight Talk. This model of the Galaxy S3 is a little different to the other S3’s that have come out, model numbers have changed and also has a locked down firmware like that of the Samsung Galaxy S2 from Straight Talk. If you are after an S3 this will possibly be a chance to get one on the cheap, but you will be restricted to Straight Talk bull shit unlimited plan. Using the Sprint LTE network this phone still represents far better value than getting a phone through a Sprint store. so yeah, if you're in the market for one... go for it!
These are the model numbers that identify the network of your Straight Talk Samsung Galaxy S3:
Straight Talk Samsung Galaxy S III - SGH-I747 - AT&T
Straight Talk Samsung Galaxy S III - SCH-S968C - Verizon
Straight Talk Samsung Galaxy S III - SCH-S960L - Sprint