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lg g-slateT-Mobile has finally come clean on its latest flagship devices, a 4G version of Samsung’s Galaxy S phone, and LG’s G-Slate Android tablet, which will try to differentiate itself from the crowd with 3D recording and playback capabilities.

The news comes only a few days before the Mobile World Congress event in Barcelona, where many competitors will also be touting their latest and greatest phone and tablet hardware.

The Galaxy S 4G is basically a suped up version of T-Mobile’s existing Samsung Vibrant phone. It supports T-Mobiles 4G HSPA+ network at speeds up to 21Mbps (around ten times faster than its 3G network), and it will feature a front-facing camera with Qik video chat software built-in. The battery also appears to be slightly larger than its predecessor, likely compensating for the more power hungry 4G connection.

In short, if you’ve been holding out for a new T-Mobile phone, the Galaxy S 4G looks to be your dream device.

As for LG’s Slate, this is the first time we’ve received any solid details on the device, other than its brief appearance at the Consumer Electronics Show last month. Like most tablets on the horizon, it sports a 1 gigahertz dual-core Nvidia Tegra 2 processor, but its real claim to fame is its 3D capabilities. The 8.9-inch G-Slate can record 3D video using its rear stereoscopic camera and users can play back the video using 3D glasses. It joins devices like Fujifilm’s 3D HD camera that can easily create 3D video, although I’m not convinced that this is something that consumers actually want.

T-Mobile says we can expect the Galaxy S 4G later this month and the LG G-Slate some time in Spring. Pricing for both devices has yet to be announced.

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