The Samsung Galaxy S 4 has a 5-inch, 1080p Super AMOLED display. It has a quad-core processor and 2GB of RAM.

The Galaxy S4 is thinner than the Galaxy S 3. It is 7.9mm thick and weighs 130 grams.

The phone is still made of plastic. Even though the edges look like aluminum, the body is actually polycarbonate.

The biggest hardware upgrade? Probably the 13-megapixel camera. There is also a 2-megapixel front-facing camera.

The Galaxy S 4 runs Android 4.2.2. Samsung has made some changes to Google's operating system. One of them lets you put show two apps on the screen at once.

Samsung's S Health app monitors your fitness activities, including your steps taken and calories burned.

With the Galaxy S4, Samsung has redesigned the camera app to look like the one on its Galaxy camera. You have a number of different settings, including one that lets you take photos from the front-facing and rear-facing cameras at the same time.

Samsung has put an IR blaster on its phone so you can use it as a remote control for your TV. With the software you can see images of upcoming programs and control a DVR.