The official Galaxy S II press conference has only just begun (it's streaming live now), but all 3 carriers we've been expecting to see the S II on - Sprint, AT&T, and T-Mobile - have already sent out their press releases.

The Galaxy SII is already available in Europe and Korea, debuting as Samsung's fastest selling smartphone to date. The 3 variants in the U.S. will share many of the same specs, but some aspects, such as the screen sizes, battery capacities, and mobile radios, will be different.

It was announced today at a New York City press event hosted by Samsung that AT&T would join T-Mobile and Samsung in offering the highly-anticipated Galaxy S II smartphone. The device will largely mirror the international version of the phone, which debuted last sprint. It sports a 4.3-inch Super AMOLED Plus display, a 1.2GHz dual-core CPU, and an 8MP camera capable of 1080p video capture. The phone is compatible with AT&T’s HSPA+ network.

Samsung Galaxy S II phone will be launched by AT&T, T-Mobile and Sprint, it is expective phone as iPhone 5. The device will largely mirror the international version of the phone. It sports a 4.3-inch Super AMOLED Plus display, a 1.2GHz dual-core CPU, and an 8MP camera capable of 1080p video capture. What accessories do you need for this phone?

Samsung Electronics Co. will introduce its Galaxy S II smartphone next week—considered its best shot at cutting into the iPhone's market-share dominance—but the company will have to do it without the biggest U.S. wireless carrier: Verizon Wireless.