IPhone 4

The iPhone 4 is a touchscreen smartphone developed by Apple. It is the fourth generation of iPhone, and successor to the iPhone 3GS. It is particularly marketed for video calling, consumption of media such as books and periodicals, movies, music, and games, and for general web and e-mail access. It was announced on June 7, 2010, at the WWDC 2010 held at the Moscone Center, San Francisco, and was released on June 24, 2010, in the United States, the United Kingdom, France, Germany and Japan.
The iPhone 4 runs Apple's iOS operating system, the same operating system as used on previous iPhones, the iPad, and the iPod Touch. It is primarily controlled by a user's fingertips on the multi-touch display, which is sensitive to fingertip contact.
The most noticeable difference between the iPhone 4 and its predecessors is the new design, which incorporates an uninsulated stainless steel frame that acts as the device's antenna. The internal components of the device are situated between two panels of chemically strengthened aluminosilicate glass. It has an Apple A4 processor and 512 MB of eDRAM, twice that of its predecessor and four times that of the original iPhone. Its 3.5-inch (89 mm) LED backlit liquid crystal display with a 960×640 pixel resolution is marketed as the "Retina Display".
The latest operating system release is iOS 4.3.

Developer	Apple Inc.
Manufacturer	Foxconn (UMTS/GSM model) Pegatron (CDMA model)
Slogan	This changes everything. Again.
Form factor	Capacitive Touchscreen smartphone
Generation	4
Release date	GSM model: 24 June 2010 CDMA model: 10 February 2011
Operating system	iOS 4.3.1 (build 8G4) (GSM) Released March 25, 2011; 10 days ago iOS 4.2.6 (build 8E200) (CDMA) Released February 10, 2011; 53 days ago
Power	Built-in rechargeable Li-ion battery 3.7 V at 1420 mAh
CPU	Apple A4 (ARM Cortex-A8)
GPU	Apple A4 (PowerVR SGX 535)
Storage capacity	16 GB or 32 GB flash memory
Memory	512 MB eDRAM
Display	3.5-inch (89 mm) diagonal 1.5:1 aspect ratio widescreen LED backlit IPS TFT LCD Retina display 640x960 resolution at 326 ppi (0.61 Megapixels) 800:1 contrast ratio (typical) 500 cd/m2 max brightness (typical) Fingerprint-resistant oleophobic coating on front and back glass
Audio	Single loudspeaker 3.5 mm TRRS Frequency response: 20 Hz to 20 kHz
Input	Multi-touch touchscreen display Push-buttons Dual microphone 3-axis gyroscope 3-axis accelerometer Digital compass Proximity sensor Ambient light sensor
Rear camera	5 MP back-side illuminated sensor HD video (720p) at 30 fps 1.75 μm size pixels 5× digital zoom Tap to focus video or still images LED flash Photo and video geotagging
Front camera	.3 MP (VGA) SD video (480p) at 30 fps 25.17 μm size pixels Tap to focus video or still images Photo and video geotagging
Connectivity	Wi-Fi (802.11 b/g/n) (2.4 GHz only) Bluetooth 2.1 + EDR GSM model: Quad-band GSM/GPRS/EDGE (800 850 900 1800 1900 MHz) Quad-band UMTS/HSDPA/HSUPA (800 850 900 1900 2100 MHz) (800 MHz not yet announced as supported by Apple) CDMA model: Dual-band CDMA/EV-DO Rev. A (800 1900 MHz)
Hearing aid compatibility	GSM 3G 850/1900 MHz M4, T4 2G 850 MHz M3, T3 2G 1900 Mhz M2, T3 CDMA M4, T4
Online services	App Store, iTunes Store, iBookstore, MobileMe
Dimensions	115.2 mm (4.54 in) (h) 58.66 mm (2.309 in) (w) 9.3 mm (0.37 in) (d)
Weight	137 g (4.8 oz)
Predecessor	iPhone 3GS

Samsung Galaxy S

The Samsung Galaxy S is an Android smartphone that was announced by Samsung in March 2010. It features a 1 GHz "Hummingbird" processor along with 8–16 GB internal Flash memory, a 4-inch 480×800 pixel Super AMOLED (PenTile) capacitive touchscreen display, a 5-megapixel camera and on select models, a VGA front-facing camera.The base version of the phone, the GT-I9000, was quickly followed by variant models for the US carriers, including the Epic 4G, Vibrant, Captivate, and Fascinate.
The Samsung Galaxy S has a PowerVR graphics processor yielding 20 million triangles per second, making it the fastest graphics processing unit in any Android phone at the time of release. It was the first Android phone to be certified for DivX HD,and at 9.9 mm it was the thinnest Android phone at the time of release.
As of January 2011, Samsung had sold 10 million Galaxy S phones globally.The Galaxy S was named the European Smartphone of the Year at the European Imaging and Sound Association (EISA) Awards 2010-2011.

Manufacturer	Samsung Electronics
Compatible networks	Dual band CDMA2000/EV-DO Rev. A 800/1900 MHz CDMA 800/1900 MHz EVDO Rev. A, WiMAX 2.5 to 2.7 GHz 802.16e 2.5G(GSM/GPRS/EDGE): 850/ 900/ 1800/ 1900 MHz 3G (HSDPA 7.2 Mbps, HSUPA 5.76 Mbps): 900/ 1900/ 2100 MHz
First released	June 2010
Predecessor	Samsung Galaxy i-7500
Successor	Samsung Galaxy S II
Type	Touchscreen smartphone
Form factor	Slate (most versions) Slider (Sprint version)
Weight	118 g (4.2 oz) to 155 g (5.46 oz).
Operating system	Android 2.2.1 with TouchWiz UI 2.9 in some variants and 3.0 in others
CPU	Samsung Hummingbird S5PC110 (ARM Cortex A8), 1 GHz
GPU	PowerVR SGX 540
Memory	512 MB RAM
Storage	8/16 GB (Flash Nand Memory)
Removable storage	microSD (up to 32 GB supported)
Data inputs	Multi-touch capacitive touchscreen display, 3-axis accelerometer, additional 3-axis gyroscope, digital compass, proximity & light sensors, Swype; physical QWERTY keyboard on Sprint version only
Display	4.0 in 480x800 (width x height in portrait orientation) @ 233 ppi WVGA Super AMOLED (0.37 Megapixels) with mDNIe
Rear camera	5 Megapixel with Auto Focus, 720p HD Video, Self shot, Action shot, Panorama shot, Stop motion, Smile shot, Add me Front-facing VGA camera (on select models)
Connectivity	Wi-Fi (802.11b/g/n); Bluetooth 3.0; USB 2.0, DLNA, Radio FM with RDS
Other	TV out, Integrated Messaging ‘Social Hub’, Android Market, Samsung Apps, A-GPS, Augmented Reality with Layar Reality Browser, Video Messaging. Exchange ActiveSync, Offline & No SIM Mode, Voice Command, RSS Reader, Widgets, Smart Security

HTC Desire

The HTC Desire (codenamed Bravo)  is a smartphone developed by the HTC Corporation, announced on 16 February 2010 and released in Europe and Australia in the second quarter of the same year. The HTC Desire runs the Android operating system, version 2.2 "Froyo". Android, version 2.3 "Gingerbread" update coming in May or June 2011. Internally it bears a strong resemblance to the Nexus One, but differs in some features.
The phone uses a 1 GHz ARMv7 "Snapdragon" processor, includes a 5 megapixel auto-focus camera and an optical trackpad, and was among the first consumer devices to feature a large, full-color active-matrix OLED (AMOLED) display.
During late Q2 2010, HTC made the decision to switch the Desire's display to a Sony "Super LCD" panel. Although this was brought on by a severe AMOLED panel supply shortfall, the new display greatly enhances text readability because of its improved effective resolution, one of the few complaints people had with the original Desire model.
Compared to the original AMOLED display, the SLCD display has more accurate color reproduction, far less susceptibility to burn-in, similar peak brightness and optimal viewing angles, but a lower contrast ratio.
The new SLCD display was claimed to have similar or better power efficiency compared with the original AMOLED display; however, this has proved to not always be the case because with AMOLED pixels' ability to completely turn off, black or dark pixels use very little power. However, in situations when the screen is predominantly bright (such as when viewing many web pages), the AMOLED display uses more power.
The hardware is capable of high-definition (720p) video recording and playback.