A friend of mine sent me a text earlier this evening saying his iPhone 5 had just lit up with LTE. I was disappointed to see it missing from my notification bar, but we do live in different areas of the city.
I immediately surfed over to AT&T’s website which still listed Salt Lake City in the coming soon column.
To my surprise and delight, less than two hours later, my GS3 has connected to the LTE network.
I will follow up with more tomorrow since my home has never had the best reception, but if you are in SLC and have any other info, confirmations in your location, speed tests, etc. then post them in the comments.