Samsung Galaxy S4
Hardware
The Samsung Galaxy S4 scales up the flagship formula with a 5.0-inch Full HD Super AMOLED display boasting a 1920x1080 resolution (~441 ppi) in a 16:9 aspect ratio. The panel debuted Samsung's "Diamond Pixel" matrix architecture to sharpen text and subpixel rendering, shielded by the then-new Corning Gorilla Glass 3 and surrounded by a slimmer-bezel polycarbonate chassis featuring a subtle, textured micro-dot pattern. Launching globally in Black Mist and White Frost (before expanding to specialized shades like Arctic Blue, Aurora Pink, and Deep Black), the S4 consolidated its global design language, though it spawned several major spin-offs: the rugged S4 Active with IP67 water resistance and physical navigation keys, the compact S4 Mini, and a highly praised stock-Android "Google Play Edition."
Under the hood, internal configurations were strictly divided by regional network demands. The global 3G flagship (GT-I9500) introduced the industry's first mainstream big.LITTLE mobile architecture via the 28nm Samsung Exynos 5 Octa 5410, which coupled a high-performance 1.6 GHz quad-core cluster with a power-saving 1.2 GHz quad-core cluster alongside an IT PowerVR SGX544MP3 GPU. Meanwhile, North American, European, and initial LTE markets received a 1.9 GHz quad-core Qualcomm Snapdragon 600 (APQ8064T) processor with Adreno 320 graphics (later upgraded to a Snapdragon 800 in a late-2013 LTE-Advanced variant). All iterations standardized 2 GB of LPDDR3 RAM alongside 16 GB, 32 GB, or 64 GB of internal storage, expandable up to 64 GB via microSD, though the 16 GB baseline model faced consumer scrutiny because TouchWiz firmware and heavy feature bloat consumed nearly half of the out-of-the-box storage. Power is supplied by a user-removable 2600 mAh Lithium-Ion battery that supports optional Qi wireless charging via specialized replacement back covers. Wired charging and data transit utilize a micro-USB 2.0 port equipped with MHL 2.0, which allowed users to mirror 1080p video directly to TVs without requiring an external power source. Optics are anchored by a 13 MP rear camera utilizing a Sony Exmor RS sensor with an f/2.2 aperture, an LED flash, and 1080p video capture, alongside a 2 MP front-facing camera. The imaging system relied heavily on gimmicky but popular software features driven by a "Dual Shot" mode that embedded a stamp-sized cutout of the photographer’s face into the main image, alongside "Sound & Shot" (capturing audio fragments with a photo) and "Drama Shot." Traditional security consists of standard Android patterns and PIN locks, but the S4 packed an unprecedented array of environment and behavioral sensors. To power its heavily marketed "Air View" and "Air Gestures," it integrated an infrared (IR) gesture sensor alongside a temperature sensor, a humidity sensor, a barometer, a 3-axis gyroscope, an accelerometer, a digital compass, and proximity/ambient light sensors. For connectivity, the device includes an IR blaster on the top edge to operate TVs via Samsung's WatchON app, dual-band Wi-Fi 802.11 a/b/g/n/ac (marking the line's transition to Wi-Fi 5), Bluetooth 4.0 LE, NFC, GPS with GLONASS, and a 3.5mm headphone jack powered by a Wolfson WM5102 audio codec on Exynos variants.