U.S. residents have had to sit idly by as one of the best Sony Ericsson smartphones in recent memory, the Xperia arc, made its tour around other parts of the world. It looks like the wait has come to an end, as an unlocked version of the Xperia arc is now listed in Sony Ericsson’s U.S. store.

This particular variant features 3G compatibility on the 800/850/1900/2100MHz bands, meaning you can get the most out of it on AT&T’s network. Using it on T-Mobile will slow you down to 2G, EDGE speeds though, since it does not support the 1700MHz AWS band.

You still get all of the goodies that has made the Xperia arc a favorite among reviewers, including the 4.2-inch, Bravia display, 8 megapixel camera, and Android 2.3 Gingerbread with Sony Ericsson’s custom interface. All of those fine specs are crammed into an 8.7mm (0.34in) thin chassis that weighs only 117g (4.13oz).

Interested shoppers can expect to drop $600 when they place their order directly from Sony Ericsson, which plans to ship these American Xperia arcs out starting tomorrow

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