Samsung announced that it has sold 30 million Galaxy S and Galaxy S II smartphones worldwide since the line's launch in 2010.

According to the company, it has sold nearly 20 million Galaxy S units, making that handset the fastest-selling smartphone it has ever launched. Sales of the Galaxy S II have reached more than 10 million since its launch earlier this year, CNET reports.

Samsung's Galaxy S and Galaxy S II are two of the more impressive Android-based smartphones on the market. But even with all that and their sales success, the devices are still in the shadow of Apple's iPhone, the report says.

Apple announced that they sold 4 million iPhone 4S during the first weekend of its sale. That news comes just a few months after Apple announced that it sold more than 20 million iPhone units in the three-month period ended June 25.

However, at least in Japan and Australia, Samsung is trying to stop Apple's iPhone 4S sales from going any higher. The company filed injunction requests in Japan and Australia, arguing that Apple's new handset violates patents it holds related to wireless technology and user-interface designs. So far, Apple has not responded to those lawsuits.