As of Friday, Sept. 9, Walmart began taking pre-orders for the Samsung Galaxy S II, which will be available in three different versions for AT&T, Sprint, and T-Mobile.

According to rumors, Verizon has chosen not to offer the Samsung Galaxy S II, in order to exclusively launch the Droid Prime.

Sprint’s version of the device is called the “Samsung Galaxy S II Epic 4G Touch,” features a 4.52-inch display, and will run on Sprint’s WiMax network.

AT&T’s version features the original 4.3-inch screen, and will run on AT*T’s HSPA+ network.

T-Mobile’s version, which currently does not have a name, will also feature a larger 4.52-inch screen, and will run on T-Mobile’s HSPA+ network.

All Samsung Galaxy S II models will feature a 1.2GHz dual-core processor, 1GB of RAM, 16GB of storage, an 8-megapixel rear-facing camera with 1080 HD video recording (with pre-installed video editing software), and a 2-megapixel front-facing camera. All models will run on Gingerbread with Touchwiz 3.0.

Walmart is offering the new Samsung Galaxy S II for $99.99, $100 less than what Sprint is currently selling it for.

The new Android device will be available at Sprint on September 16th for $199.99 on a new two-year plan. Pre-orders for the Samsung Galaxy S II through Sprint can be made by purchasing a $50 Sprint gift card.

AT&T’s Samsung Galaxy S II will be available on September 18th, but there is currently no information regarding its price.

T-Mobile has mentioned that their version of the device will be available in the Fall, and did not mention any information regarding the phone’s price.