It looks as though someone is lucky enough to be playing with the Samsung GT-i9100, the user calls is the "Galaxy 2" and tweet's that it's "so technically advanced" giving thanks to it's dual core processor.
I've been posting a bit of news in regards to the upcoming dual-core phone from Samsung - it seems to be the only one who's stepped into the limelight thus far - it should be based on the previously posted Coretex-A9 Orion chip which is being sampled now.
But - nothing in the tech business is 100%. But - the current Galaxy S had a code name of GT-i9000 so one would presume this is the upgrade to the Galaxy, with Android's Gingerbread OS powering it also.
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