Samsung has released some updated sales figures for its Galaxy S II smartphone, announcing that in ten months since it launched, the device has shipped more than 20 million units, becoming its most popular smartphone by a massive distance.

The total includes both domestic and overseas markets, reaching the milestone quicker than its predecessor, the Galaxy S. Between the two devices, Samsung has shipped 40 million units of its Galaxy S models, with the range possibly receiving an additional boost should the company announce the successor to the bestseller, in the coming months.

Samsung says that the figures only account for the number mobile devices it shipped to operators, not the number of smartphones it has sold. Yet again, we aren’t give a real picture of Samsung sales, as demonstrated in the company’s quarterly financial reports.

That isn’t to say sales aren’t close to that mark, it just makes it hard to accurately compare them to sales of its rivals — like Apple — which sold 37 million iPhones in the last quarter alone.

In October, combined sales of Galaxy S and Galaxy S II smartphones topped 30 million units worldwide, with both devices breaking company sales records since launch. The Galaxy S II generated more than 10 million sales, making it the quickest selling device in the company’s history, with the Samsung Galaxy S falling just short of 20 million sales after launching in 2010.

Obviously, the Galaxy S is only on sale in a very small number of outlets following Samsung’s recent updates to its smartphone range, plus the device has not been supported in the company’s latest Ice Cream Sandwich software roll out.

Samsung’s January financial report saw the company exceed its preliminary financial estimates to post record operating profit of 5.3 trillion won ($4.72 billion), a 76% rise year on year, thanks to increased smartphone, memory chips and flat-panel sales.