The Samsung Galaxy S4 is a smartphone manufactured by Samsung Electronics. It was announced in New York City on 14 March 2013. It is the successor to the Samsung Galaxy S III. It has new software features such as Smart Alerts, Smart Stay, and Smart Scroll, a 13-megapixel back camera, and a 4.99-inch (127 millimetres) 1080p display. The S4 has two major versions, one featuring an Exynos 5 Octa and the other featuring a Snapdragon 600. It will be available in late April 2013 on 327 networks worldwide and in 155 countries and on or before May 1 on the US networks T-Mobile and AT&T. The S4 reached 10 million pre-orders in the first two weeks after its announcement.Samsung moved up the release date in South Korea from 27 April to 26 April 2013.