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UNLOCKED: Samsung Galaxy SIII 16GB quad-core and dual-core 2GB RAM on Amazon deals.
There are two versions of the Samsung Galaxy SIII unlocked available for you on Amazon the first two banners are of the International version with quad-core cpu and the second two banners with dual-core chip but with 2GB RAM:
International versions quad-core unlocked 16GB:
Unlocked dual-core 2GB RAM, 16GB: