Just last week Samsung dropped a whole range of new colors for the Galaxy S 3, but as you would expect not everyone seems to be able to get all of them, everywhere. In the UK at least, the Garnet Red variety is available should you desire one. The phone is exclusive to the Carphone Warehouse in the UK, but seems to be available at the same price as the other colors, and across the major networks provided by the retailer.
Previously we've seen the Garnet Red Galaxy S 3 offered up by AT&T in the United States. And, whilst differing European carriers were displaying the black, and grey versions at IFA 2012 in Berlin, the red S 3 was nowhere to be seen. We've still not seen the brown version yet either.
Source: Carphone Warehouse