And here we go! Samsung announced late last night that the long-awaited Galaxy S III would hit five of the U.S.'s biggest carriers – Verizon Wireless, Sprint, T-Mobile, AT&T, and U.S. Cellular – this month. Not long after Samsung’s initial announcement went out, many of the carriers in question jumped into the fray with their own announcements, so here’s a cheat sheet to stay on top of which carrier is doing what with the Galaxy S III.