According to BGR, the Galaxy S II, has sold over three million units worldwide and it had not even launch in the North America yet. And the S II has already sold more units than the original Galaxy S.
What is amazing is that the Galaxy brand was the effort of Samsung alone without the support of a carrier. Remember that the Droid brand by Verizon Wireless with Motorola's Android devices.
Where does Samsung go from here with the Galaxy brand? Right now, the Korean megacorp is embroiled in a number of lawsuits, the biggest one involved Apple. Apple has accused Samsung of copying its designs.
Despite this, Samsung will continue to expand this line into new markets. And Galaxy tablets based on Android as also just coming to the market.
Furthermore, I expect Google and Samsung will get closer over time as the mobile war escalates in the courts and the market.
Source: Boy Genius Report