The Samsung Galaxy S4 is a high-end smartphone manufactured by Samsung Electronics. It was announced in New York City on March 14, 2013 as the successor to the Samsung Galaxy S III. The phone’s software has many proprietary software features such as Air Gesture, Smart Stay, and Smart Scroll.
Hardware features include a 13-megapixel back camera, and a 5-inch (130 mm) 1080p display. It is the first TCO certified smartphone. The S4 has two major variants, one featuring a quad-core Qualcomm Snapdragon 600 and the other featuring a Samsung Exynos 5 Octa. The Exynos 5 Octa version features the first Big.little architecture central processing unit (CPU). The CPU has eight cores, four of which (one from each big.LITTLE set of two) can be active at one time to emulate a quad-core processor.
The S4 was made available in late April 2013 on 327 networks worldwide and in 155 countries. Upon its release, it became the fastest selling smartphone in Samsung’s history. Samsung sold 20 million Galaxy S4 units worldwide in the two months following the device’s launch. Google released a version of the U.S. Galaxy S4 running stock Android with Samsung-provided updates.
Samsung has announced that they will be releasing a “mini” variant of the S4, a “Zoom” variant, and an “Active” variant. The “Active” variant will have a water-resistant IP 67 case, shock resistance, and an 8-megapixel camera. On June 17, 2013, JK Shin, vice president of Samsung Mobile announced that the Samsung Galaxy S4 is to have another variant with LTE-Advanced connection, which is twice the speed of 4G LTE.