T-Mobile today released details LG G-Slate tablet and Samsung Galaxy S 4G smarpthone. The two devices were originally unveiled in early January at the Consumer Electronics Show (CES) in Las Vegas.

The Galaxy S 4G, which T-Mobile says is capable of theoretical speeds of 21 Mbps on the carrier’s HSPA+ network, will be available sometime this month. The LG G-Slate will be available in March.

The Galaxy S 4G features a 4-inch Super AMOLED touchscreen and comes running Android 2.2. Additional specs for the phone include a 1GHz Cortex A8 Hummingbird processor, 5-megapixel camera, pre-installed 16GB microSD memory card, 1650 mAh lithium ion battery, Wi-Fi, Bluetooth and 720p video capture.

The star of today’s announcement is undoubtedly the LG G-Slate tablet, which garnered considerable attention when it was unveiled at CES, but T-Mobile offered few details on the product then. According to a press release, the G-Slate delivers on some of that hype, with a few suprises.

The G-Slate runs Android 3.0 (Honeycomb) and features an 8.9-inch HD 3D-capable multi-touch display. Users will be able to view and record 3D content. According to the press release, 3D will viewable on the G-Slate with the aid of glasses.

Additional specs include a 5-megapixel camera with LED flash, Wi-Fi, 1080p HDMI out, NVIDIA TEgra 2 dual-core processor, supprt for Flash, gyroscope, accelerometer and 32 GB of internal memory.  

In conjunction with the device announcements, T-Mobile also said it has flipped the switch on its HSPA+ network in additional markets. Beginning today, T-Mobile’s network is also delivering HSPA+ to Albany, Augusta, Columbus and Macon, Ga., and Chattanooga, Tenn., in the South region as well as in Champaign, Ill.; Lansing, Mich.; and Rochester, Minn., in the Midwest.

T-Mobile says it plans to double the speed of its 4G network in 2011. The carrier expects that 140 million Americans in 25 major metropolitan areas will have access to theoretical speeds of 42 Mbps by mid-year.