LG Optimus 4X HD smartphone was launched in July 2012. The phone comes with a 4.70-inch touchscreen display with a resolution of 720 pixels by 1280 pixels at a PPI of 312 pixels per inch. The LG Optimus 4X HD is powered by 1.5GHz quad-core Nvidia Tegra3 processor and it comes with 1GB of RAM. […]