I heard that Samsung Galaxy S III will be released on June 21 via Sprint. It comes in 16GB and 32GB at $200 and $250 respectively. Can we avail it prior to its release? Will I get this device cheaper if I purchase it via T-Mobile or AT&T perhanps? Also, what would be the advantage of this quad-core beauty that comes with google-wallet friendly? What other mobile devices that are at par with this Samsung Galaxy S III?