Samsung Galaxy S5

Samsung Galaxy S5 is an Android smartphone produced by Samsung Electronics. Unveiled on 24 February 2014 atMobile World Congress in Barcelona, Spain, it was released on 11 April 2014 in 150 countries as the immediate successor to the Galaxy S4. As with the S4, the S5 is an evolution of the prior year's model, placing a particular emphasis on an improved build with a textured rear cover and IP67 certification for dust and water resistance, a more refined user experience, new security features such as a fingerprint reader and private mode, expanded health features (such as a built-in heart rate monitor), and an updated camera.

The Galaxy S5 received mostly positive reviews; The phone was praised for its display, hardware, camera and battery life but it was criticized for its plastic design, bloated software and the inconsistent fingerprint scanner featured on the phone

Hardware and design

The design of the S5 evolves upon the design of the S4. It features a rounded,polycarbonate chassis carrying a "modern glam" look, faux metal trim and a removable rear cover. Unlike past models, the S5's rear cover uses a higher quality soft plastic and is dimpled to improve grip. The S5 is IP67 certified for dust resistance, and for water resistance in up to 1 metre (3.3 ft) of water for up to 30 minutes; as such, the S5's Micro-USB 3.0 port uses a removable cover. The S5 is available in Charcoal Black, Electric Blue, Copper Gold, and Shimmery White color finishes. The S5's screen is a 5.1-inch (130 mm) 1080pSuper AMOLED panel, which is slightly larger than that of the S4, and allows for automatic brightness and gamut adjustments.^[14][15][16]

Below the screen are three buttons. The physical "Home" button in the center contains a swipe-based fingerprint scanner. The "Recent apps" and "Back" buttons are capacitive. In accordance with Android 4.0 human interface guidelines, the S5 no longer uses a "Menu" key like its predecessors, although its button layout is still reversed in comparison to other Android devices with the S5's button layout (such as the HTC One X andGalaxy Nexus, whose "Back" buttons are to the left of "Home").^{[14][15][16][17]}

The S5 includes a 16 megapixel rear-facing camera, which offers 4K video recording, phase detection autofocus(which can focus in around 0.3 seconds),^[14] real-time HDR photos and video, and an image sensor with Samsung's "Isocell" technology, which isolates the individual pixels inside the sensor to improve its ability to capture light and reduce crosstalk. Compared to conventional BSI sensors, this reduces electrical crosstalk by about 30 percent.^[18] Next to the camera's flash on the rear of the device is a heart rate sensor, which can be used as part of the S Health software.^{[14][15][16][19][20]} The top of the device has an IR blaster and headphone jack. The IR blaster is a transmitter only and it has a built-in database of devices that can be controlled by Samsung's Smart Remote application.^{[citation needed]}

The S5 is powered by a 2.5 GHz quad-core Snapdragon 801 system-on-chip with 2 GB of RAM. Although not mentioned during the keynote presentation, a variant (SM-G900H) with an octa-core Exynos 5422 system-on-chip was also released in multiple markets.^[21] Like the previous model, it uses two clusters of four cores; four Cortex-A15 cores at 1.9 GHz, and four Cortex-A7 cores at 1.3 GHz.^[22][23] Depending on resource usage, the SoC can use the power-efficient A7 cores for lighter processing loads, and switch to the A15 cores for more demanding loads. Unlike previous iterations, however, the Exynos 5422 can run both sets of cores at the same time instead of only one at a time.^[24][25]

The S5 contains a 2800 mAh battery; It also contains an "Ultra Power Saving" mode to extend further battery life; when enabled, all non-essential processes are disabled, and the screen switches grey scale rendering. Samsung claims that with Ultra Power Saving on, an S5 with 10% charge remaining can last for an additional 24 hours in standby mode.^[19][26][27] Another improvement in power efficiency comes from the use of Qualcomm's envelope tracker, which reduces the power used in connectivity