Samsung Electronics announced its Galaxy S4 handset will be available from the second quarter of 2013 globally. The handset features "the world’s first full HD Super AMOLED display" - a 5-inch screen with a resolution of 441 pixels per inch (PPI), compared with the iPhone 5's 326 PPI. The Galaxy S4 has also been designed to support HSPA+42 Mbps and LTE across up to six different spectrum bands. Samsung said a TDD/FDD LTE dual mode version will be introduced later this year.
Samsung also said the new handset can "detect your face, voice and motions to enable screen control with no need for finger touch activation.... when you are watching a video [for example], the video pauses when you look away then it starts right up again when you are back." source: Samsung statement