Samsung unveiled two major updates to its Galaxy lineup at Mobile World Congress today with a new tablet and a dual-core smartphone.

The new Galaxy Tab 10.1 tablet uses Android 3.0 Honeycomb and sports a 10.1-inch touchscreen, surround-sound speakers, front- and rear-facing cameras and a 1GHz dual core application processor. The Tab 10.1 will go on sale with Vodafone this spring in more than 20 unspecified global markets.

The Galaxy S II smartphone runs on Android 2.3 Gingerbread and comes equipped with a 4.27-inch AMOLED display, and Samsung says the device is able to support NFC. Like the Tab 10.1, the Galaxy S II has both front- and rear-facing cameras and a 1GHz dual core application processor. Both devices have an 8 megapixel rear-facing camera and a 2 megapixel front-facing camera.

“In 2011, we will take Samsung’s leadership in speed, screen and content to a whole new level,” said JK Shin, head of Samsung’s mobile business, in a statement. “With the GALAXY S II, Samsung wants to set the new standard of quality viewing on mobile, powerful performance, and slim and modern design.”

The Galaxy S II is the launch pad for the company’s new Samsung Hubs service, a portal subscribers can use to manage communications and buy digital books, magazines, music and games. Samsung did not say when the Galaxy S II would be available, and did not specify which operators the smartphone would launch with.

Samsung shipped two million Galaxy Tabs in the fourth quarter, and has sold 10 million smartphones from its Galaxy S lineup since the device made its debut last June. The company believes it will double the number of smartphones it sells this year.