Sadly, the FM Tuner was excluded from the US model in favor of the LTE chip and antennas. You will only be able to stream data using something like Tune In Radio.
I used the FM tuner on my old phone almost every day. It was a major disappointment for me when I got my S3 home. Unfortunately, apps like Tune-In Radio buffer and cut out constantly especially when you on an open wifi in public in which the signal strength varies constantly. The only way to really get some your old FM functionality back is to rely on podcasts.
The S3 is still probably one of the top 3 phones out there, especially considering that Apple NEVER includes an FM tuner on any of their products.