All three carriers will have a white version and a blue version with AT&T adding the aforementioned red model at a later date. AT&T, Sprint and Verizon are each asking $199.99 with a signed 2-year contract for the 16GB variant of the device. Sprint and Verizon have each tagged the 32GB model for $249.99 with a signed 2-year pact.
Best Buy's big box locations and Best Buy Mobile have already started accepting pre-orders pre-sales for the Sprint, AT&T and Verizon variants of the phone at the same $199.99 and $249.99 contract price for the 16GB and 32GB versions respectively (except for AT&T which is offering just the 16GB unit, of course). The retailer's web site is still not yet showing the handset. And that leaves U.S. Cellular and T-Mobile. The latter has no pre-order date scheduled, but is scheduled to have both 16GB and 32GB models available for purchase on June 21st. The former is expected to accept pre-orders on June 12th with the Samsung Galaxy S III arriving in July.
source: Verizon, Sprint, AT&T