Samsung on Thursday unveiled a larger Galaxy S III smartphone in London, and said the phone would be sold in the U.S. this summer after launching in Europe on May 29.

Samsung didn't name a U.S. wireless carrier or the price for the smartphone, but said the U.S. version will run over LTE and HSPA+, an indication it could run on AT&T's or T-Mobile's network. A white version of the Galaxy S III was unveiled by Samsung's president of mobile communications, J.K. Shin, at a crowded London media event that featured a live orchestra and was also webcast.

The Galaxy S III, will run Android 4.0 (Ice Cream Sandwich) and will have a 4.8-in. touchscreen with an HD Super Amoled display at 1280 x 720 pixels. It includes an 8-megapixel rear-facing camera and a 1.9-megapixel front-facing camera. It will also come in blue.

The touchscreen may seem large at 4.8 inches, Samsung officials acknowledged, but the device is not much bigger than the previous model, the Galaxy S II, because the bezel area around the screen has been reduced. Overall, the screen is 22% larger than the Galaxy S II.