Samsung Galaxy S4

The Samsung Galaxy S4 is a high-end, Android smartphone produced bySamsung Electronics. First unveiled on March 13, 2013 at Samsung Mobile Unpacked in New York City, it is a successor to the Galaxy S III which maintains a similar design, but with upgraded hardware and an increased focus on software features that take advantage of its hardware capabilities—such as the ability to detect when a finger is hovered over the screen, and expanded eye trackingfunctionality (which includes scrolling). A hardware variant of the Galaxy S4 also became the first ever smartphone to support the emerging LTE Advancedmobile network standard.

The S4 was made available in late April 2013 on 327 carriers in 155 countries. Upon its release, it became the fastest selling smartphone in Samsung's history; the company sold 20 million Galaxy S4 units worldwide in the two months following the device's launch.

he screen features a 5-inch (130 mm) (sometimes stated as 4.99-inch) PenTile RGBG Full HD Super AMOLED screen with 441 pixels per inch andCorning Gorilla Glass 3.

The S4 comes with either 16 GB, 32 GB or 64 GB of internal storage, which can be supplemented with up to an additional 64 GB with a microSD card slot.

The S4 GT-I9505 includes a multiband LTE transceiver and both models feature an infrared LED that can serve as a universal remote control.In June 2013, a version of the S4 was released in South Korea with support for LTE Advancednetworks. It is the first smartphone ever produced with support for LTE Advanced. This model includes a quad-core 2.3GHz Krait Snapdragon 800 processor.

Built into the 2600 mAh battery is near field communication (NFC) connectivity, which allows users to perform non-touch payments at shops that employ specially equipped NFC cash registers. The SC-04E model has a FeliCa secure element, unlike other models which contain an NFC-A secure element. The NFC-A secure element on the SC-04E is provided on the SIM card. The battery also supports wireless charging through the Qi standard.

The Galaxy S4 supports the High Efficiency Video Coding (HEVC) video format.

In addition to the touchscreen, the S4 has several physical user inputs including a home button located near the bottom of the screen, at the bottom of the S4 is the primary microphone and the microUSB port for both data connections and charging; it also supports USB host and MHL 2.0. There are volume keys on the left side and a power/lock key on the right. At the top there is a 0.14-inch (3.6 mm) headphone jack, the secondary microphone, and infrared blaster. The backside of the S4 has the 13-megapixel camera lens and LED flash, and at the bottom left edge has the loudspeaker.

Samsung's official accessory for the S4, the S-View Cover, utilizes a hall effect sensor in the phone which detects when the cover is closed and displays battery status, time, and other phone statuses in an area of the screen visible through a window on the cover.

Notably, the S4 does not include an FM radio receiver, as previous models did.

The S4 is widely available in two color finishes, black mist and white frost, however selected regions have gold pink and gold brown. The S4 comes in two variants that differ primarily in the internal hardware: