In addition to WiMAX network, Sprint is also joining the party of LTE and the carrier is going to release the LG Viper 4G LTE smartphone. Powered a 1.2GHz dual-core processor, the phone runs Android 2.3. It features a 4-inch WVGA NOVA touchscreen, a 5 Megapixel main camera, and a  VGA front-facing camera. The Viper is a Sprint ID smartphone, allowing users to through the clutter of more than 400,000 apps in Android Market by selecting from a variety of mobile ID packs featuring apps, ringers, wallpapers, widgets and more. The Viper 4G LTE works on Sprint’s LTE mobile network.

Along with the quad-core Optimus 4X HD and 3D Optimus 3D MAX, LG is also bringing the Optimus LTE Tag to the Mobile World Congress (MWC) 2012, which is built on the Optimus LTE. Featuring a slim and sleek design, the handset comes with built-in support for NFC (Near Field Communication) and supports LG Tag+ (that are acutally also available on 4X HD and 3D MAX). Using the special stickers called Tags, users can change the phone’s settings easily with just a swipe. Swiping a tag upon entering the office could put the Optimus LTE Tag in silent mode and activate Wi-Fi. A tag on