The LG Nitro HD smartphone, made available on AT&T's networks on Sunday, is expected to face immense pressure from Samsung's Galaxy S2 Skyrocket, which, along with the HTC Vivid will be the first AT&T 4G LTE-capable smartphones.

The Nitro HD, which features a 4.5-inch True HD AH-IPS display, is the first smartphone in the AT&T portfolio with a true high definition screen. The LG smartphone is considered to be the third 4G LTE smartphone for AT&T customers.

LG's device, which takes advantage of its new proprietary True HD technology, has a 4.5-inch AH-IPS (Advanced High-Performance In-Plane Switching) display that supports resolutions up to 1280 x 720 pixels and offers unrivaled color accuracy, brightness, battery efficiency and performance.

According to LG, the Nitro HD's 500 nit display luminance allows clear viewing in direct sunlight and RGB stripe pixels deliver incredibly accurate true-to-life color rendering.

The smartphone, which runs on Google Inc.'s Android 2.3 Gingerbread OS, has dual-core 1.5 GHz Scorpion processor, 4.5-inch True HD AH-IPS display, 1 GB of RAM, 4 GB of internal memory with additional 16 GB microSD card included, 8 megapixel rear-facing LED flash camera with 1080p video capture and a secondary front-facing camera for video calls.

The LG Nitro HD, along with HTC Vivid and Galaxy S2 Skyrocket, will be able to utilize both LTE and HSPA+ 4G speeds of AT&T, for consistently fast connections in and out of LTE areas.

The Galaxy S2 Skyrocket, which runs on Google Inc.'s Android 2.3.5 Gingerbread OS, has a Scorpion dual-core processor, Adreno 220 GPU, Qualcomm APQ8060 Snapdragon chipset, 4.5-inch Super AMOLED (active-matrix organic LED) Plus display, 1 GB of RAM, 16 GB of internal memory, 4G LTE support, 8 megapixel rear-facing LED flash camera with 1080p video capture and a 2 megapixel front-facing camera for video calls.

In the midst of all the good specifications of Samsung Galaxy S2 Skyrocket, a user on the xda-developers forum said the smartphone exploded in his friend's pocket, according to BGR.com. The man doesn't appear to be injured, according to the tech Web site's reports.

He said he heard a sound, [felt] a burning sensation on his leg and as he pulled this piece of junk out of his pocket he smelled burning, the forum user wrote, as being reported by BGR.com, There was smoke coming out of his pocket and out of the phone.

Let's look at the specifications of Samsung Galaxy S2 Skyrocket and LG Nitro HD.

Display: Skyrocket touts a 4.5-inch Super AMOLED Plus display that may give a resolution of 800 x 480 pixels with about 207 ppi pixel density. On the other hand, Nitro HD touts a 4.5-inch True HD AH-IPS (Advanced High-Performance In-Plane Switching) capacitive touch-screen with 1280 x 720 pixels resolution at about 326 ppi pixel density.

Size: Nitro HD comes with 5.27 x 2.67 x 0.41 inches dimension and weighs 4.5 ounces. On the other hand, Skyrocket will come in 5.15 x 2.75 x 0.37 inches dimension and weighs 4.66 ounces.

Processor: Nitro HD features dual-core 1.5GHz Qualcomm APQ8060 processor with 1GB RAM. On the other hand, Skyrocket features 1.5 GHz Scorpion dual-core processor, Adreno 220 GPU, Qualcomm APQ8060 Snapdragon chipset with 1GB RAM.

Camera: Both the smartphones sport rear-facing 8 megapixel LED flash cameras with 1080p HD video capture capability. Skyrocket has an additional 2megapixel front-facing camera for video calling while Nitro HD has a 1 megapixel camera for video chat.

3G/4G: Both smartphones come with HSDPA 21 Mbps, HSUPA 5.76 Mbps and supports 4G LTE.

Operating System: Both smartphones have Android 2.3 Gingerbread operating system with both promised Google Inc.'s latest smartphone OS, Android 4.0 Ice Cream Sandwich.

Ice Cream Sandwich is a combination of Gingerbread and Honeycomb in one unit. Android Head of Engineering Mike Claren announced that the new OS is Google's most ambitious release to date. The newest features arriving with Android 4.0 include widgets in a new tab, a customizable launcher, Gmail with offline search with a two-line preview and new action bar at the bottom, better voice integration, improved copy and paste and a new tabbed Web browser that allows up to 16 tabs.

WLAN/Bluetooth/USB: Both smartphones have Bluetooth 3.0 version, Wi-Fi Direct, DLNA, and Wi-Fi hotspot. Additionally, Skyrocket has Bluetooth EDR stereo, mini USB 2.0 version, and Wi-Fi 802.11 a/b/g/n. On the other hand, Nitro HD has Bluetooth A2DP, HS microUSB 2.0 version, and Wi-Fi 802.11 b/g/n.

Storage: The Nitro HD has fixed 4 GB internal storage with a 16 GB microSD card included in the package that can be expanded up to 32 GB. However, the Skyrocket has a fixed 16 GB internal storage and via a microSD card slot it can expand up to 32 GB.

Battery: Nitro HD comes with a standard Li-ion 1830 mAh battery. On the other hand, the Skyrocket comes with a standard Li-ion 1850 mAh battery that gives up to 7 hours talk time and up to 256 hours of standby.

Pricing: Nitro HD is normally priced at $249.99 with a two-year AT&T contract. In selected areas, AT&T is offering a $100 discount for the LG Nitro HD. On the other hand, the Skyrocket is priced at $149.99 with a two-year AT&T contract.