Hardware: Display: 5-inch, 1920 x 1080, with Gorilla Glass 3 Processor: 1.9 GHz quad-core processor OR 1.6 GHz Octa-Core processor (depending on the market).
Weight: 130 grams Thickness: 7.9mm Rear
Camera: 13 megapixels Front camera: 2 megapixels
Storage: 16/32/64 GB internal, with a MicroSD slot for expansion.
Wi-Fi: 802.11 a/b/g/n/ac
Sensors: Accelerometer, Barometer, Gesture, Geomagnetic, Gyro, NFC, Proximity, Temperature and Humidity, and RGB light.
Bluetooth: Version 4.0 IR LED
Battery: 2,600 mAh
Software OS: Google Android 4.2.2 Jelly Bean
Drama Shot: Turns a string of photos into a timelapse.
Dual View: This lets S4 owners use both the front and rear cameras at the same time, which can also be used during video calls.
Group Play: Lets people share media between one another without Wi-Fi. Also syncs up music playback between devices.
Story Album: Pulls together photos you've taken and can be turned into photo albums.
S Health: Uses the S4's onboard sensors to track and estimate personal fitness.
S Translator: Translates voice or text within certain applications, and works offline.
S Voice Drive: Takes voice commands while driving, and turns up the size of text. Works over Bluetooth with Bluetooth-enabled cars.
Samsung Optical Reader: Scans business cards and QR codes for text.
Samsung WatchON: Uses the built-in IR to control other electronics like TVs and set top boxes.
Smart Pause: Pauses video playback when it detects that you're not looking. The same technology works for scrolling up and down on a Web page, or e-mail.