LG officially launched yesterday the first 4G LTE smartphone in Seoul, South Korea: the LG Optimus LTE.

While the official launch was for South Korea, the likelihood of the LG Optimus LTE’s arrival in the U.S. market is rather high, considering that LG had its U.S. consumers satisfied with the brand of smartphones it released in the U.S., such as the LG G2X and the LG Revolution.

For now, LG’s plan to bring the LG Optimus LTE to markets outside South Korea is still undetermined.

This Android 2.3 Gingerbread device has a 1,830-mAh battery pack, providing the device hours of power. A total of 20 GB of storage is in the box (4 GB built in, 16 GB through microSD card slot expandable up to 32 GB).

The LG Optimus LTE’s very vivid-colored 4.5-inch touchscreen with 1,280×720 pixel resolution bring imaging closer to real-life. LG claims the new device as having the highest resolution IPS (in-plane switching) display. The company’s official announcement, in fact, describes the handset as having “True HD IPS” display.

The great battery life and display, plus the 4G connectivity, make video conferencing and video recording a very remarkable experience with LG Optimus LTE, particularly since the handset also carries an 8-megapixel camera with 1080p HD video capture and playback feature, as well as a 1.3-megapixel secondary camera.

A dual-core, 1.5-GHz processor sits inside the handset, acting as its brain. It also sports an HDMI port and DLNA support, both of which make it possible for supported TV sets to be connected with the phone.

Who’s getting this LTE-capable handset when it reaches the U.S.?