The Samsung Galaxy S4 is a 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 has many distinguishing software features such as Air Gesture, Smart Stay, and Smart Scroll; 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) but does not have LTE connectivity. The CPU has eight cores, four of which 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 has sold 20 million Galaxy S4 units worldwide since that device's launch two months. 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" v :oariant of the S4, a "Zoom" variant, and an "Active" variant with 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

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