iPhone Features

Face Time

People have been dreaming about video calling for decades. iPhone 4 makes it a reality. With just a tap you can wave hello to your kids, share a smile from across the globe or watch your best friend laugh at your stories — iPhone 4 to iPhone 4 over Wi-Fi. And it works straight out of the box. No other phone makes staying in touch this much fun.
Learn more about FaceTime

Two cameras,
two views.

iPhone 4 has two cameras: One on the front, which focuses on you. And one on the back, which focuses on everything else. FaceTime lets you switch back and forth between them at any time during a video call. All you have to do is tap a button.

Retina Display

The Retina display on iPhone 4 is the sharpest, most vibrant, highest-resolution phone screen ever, with four times the pixel count of previous iPhone models. In fact, the pixel density is so high that the human eye is unable to distinguish individual pixels. Which makes text amazingly crisp and images stunningly sharp.
Learn more about the Retina display

                                                                                     

Multitasking

iPhone 4 introduces a whole new way of multitasking. Now you can run your favorite third-party apps — and switch between them instantly — without slowing down the performance of the foreground app or draining the battery unnecessarily.¹ This smarter approach to multitasking is available only in iOS 4.
Learn more about multitasking

HD Video Recording and Editing

Shoot your own movies in high definition. Capture impressive video even in low-light settings, thanks to the advanced backside illumination sensor and built-in LED light. Then edit and create your own mini-masterpiece right on iPhone 4 using the iMovie app — with Apple-designed themes, titles, and transitions. It’s available on the App Store for $4.99.
Learn more about HD video recording
Learn more about video editing with iMovie

5-Megapixel Camera with LED Flash

Take beautiful, detailed photos using the 5-megapixel camera with built-in LED flash. The advanced backside illumination sensor captures great pictures even in low light. And the front-facing camera makes it easy to take self-portraits.
Learn more about the camera

Comparison among iPods

Model	1st generation	2nd generation	3rd generation	4th generation
Status	Discontinued	Discontinued	Discontinued	In Production
Initial operating system	iPhone OS 1.1	iPhone OS 2.1.1 iPhone OS 3.1.1 (8 GB MC model)	iPhone OS 3.1.1	iOS 4.1
Highest Supported operating system	iPhone OS 3.1.3	iOS 4.2.1	iOS 4.3.4 iOS 5.0 (Beta versions)
Display	3.5 in (89 mm), 3:2 aspect ratio, glossy glass covered screen, 262,144-color LCD, 480×320 px (HVGA) at 163 ppi			3.5 in (89 mm), 3:2 aspect ratio, 24-bit color, glossy glass-covered LED-backlit LCD, 960×640 px at 326 ppi
Storage	8, 16 and 32 GB		32 and 64 GB	8, 32 and 64 GB
CPU Core / Processor	620 MHz (underclocked to 412 MHz, originally 400 MHz) Samsung 32-bit RISC ARM 1176JZ(F)-S v1.0	620 MHz (underclocked to 533 MHz) Samsung ARM11 core with internal ARM7 core for Jazelle acceleration	833 MHz (underclocked to 600 MHz) ARM Cortex-A8	1 GHz (underclocked to 800 MHz) ARM Cortex-A8 Apple A4
Graphics	PowerVR MBX Lite 3D GPU		PowerVR SGX535 GPU
Memory	128 MB DRAM		256 MB DRAM
Connectivity	Wi-Fi (802.11b/g), USB 2.0/Dock connector	In addition to previous: Bluetooth 2.1 + EDR (requires iPhone OS 3.0), Built-in speaker, Hardware volume controls, Nike+	In addition to previous: Voice Control, Includes earphones with remote and mic	In addition to previous: 802.11n (2.4 GHz only) 3-axis gyroscope Built-in microphone
GPS	N/A
Digital compass	N/A
Camera	N/A			Rear 0.7 MP backside illuminated CMOS image sensor with video (720p HD at 30 frame/s), Front VGA-quality photos and video at up to 30 frame/s.
Audio codec	Wolfson Microelectronics WM8758BG	Cirrus Logic CS4398	Cirrus Logic CS4398	Cirrus Logic (similar to iPhone 4)
Materials	Stainless steel back and aluminum bezel; plastic for Wi-Fi antenna	Contoured stainless steel back and bezel; plastic for Wi-Fi and Bluetooth antenna		no plastic for antenna
Power	Built-in rechargeable lithium-ion polymer battery
	3.7 V 2.15 W·h (580 mA·h)	3.7 V 2.73 W·h (739 mA·h)	3.7 V 2.92 W·h (789 mA·h)	3.7 V 3.44 W·h (930 mA·h)
Rated Battery life (hours)	audio: 22 video: 5	audio: 22 video: 5	audio: 30 video: 6	audio: 40 video: 7
Dimensions	110×61.8×8 mm (4.3×2.4×0.31 in)	110×61.8×8.5 mm (4.3×2.4×0.33 in)		110×58×7.1 mm (4.4×2.3×0.28 in)
Weight	120 g (4.2 oz)	115 g (4.05 oz)		101 g (3.6 oz)
Released	8 and 16 GB: September 14, 2007 32 GB: February 5, 2008	9-Sep-08	9-Sep-09	8-Sep-10
Discontinued	9-Sep-08	16 and 32 GB: September 9, 2009 8 GB: September 1, 2010	1-Sep-10	In production

iPod

The current iPod line; from left to right:
iPod Shuffle, iPod Nano, iPod Classic, iPod Touch.

iPod is a line of portable media players designed and marketed by Apple and announced on October 23, 2001, and released on November 10, 2001. The product line-up currently consists of the hard drive-based iPod Classic, the touchscreen iPod Touch, the compact iPod Nano, and the ultra-compact iPod Shuffle. iPod Classic models store media on an internal hard drive, while all other models use flash memory to enable their smaller size (the discontinued Mini used a Microdrive miniature hard drive). As with many other digital music players, iPods can also serve as external data storage devices. Storage capacity varies by model, ranging from 2 GB for the iPod Shuffle to 160 GB for the iPod Classic. All of the models have been redesigned multiple times since their introduction. The most recent iPod redesigns were introduced on September 1, 2010.

Apple's iTunes software can be used to transfer music to the devices from computers using certain versions of Apple Macintosh and Microsoft Windows operating systems. For users who choose not to use iTunes or whose computers cannot run iTunes, several open source alternatives are available for the iPod. iTunes and its alternatives may also transfer photos, videos, games, contact information, e-mail settings, Web bookmarks, and calendars to iPod models supporting those features.

For iOS versions prior to iOS 5, the iPod branding is also used for the media player applications included with the iPhone and iPad; the iPhone version is essentially a combination of the Music and Videos apps on the iPod Touch. (As of iOS 5, separate apps named 'Music' and 'Video' are to be standardized across all iOS-powered products.) In either event, the iPhone and iPad have essentially the same media-player capabilities as the iPod line, but they are generally treated as separate products.

Discontinued models of the line include the iPod Mini and the iPod Photo, the former being replaced by the iPod Nano, and the latter reintegrated into the main iPod line (now the iPod Classic).

Comparison among iPhones

Model	iPhone	iPhone 3G	iPhone 3GS	iPhone 4
Status	Discontinued	Discontinued	In Production	In Production
Initial operating system	iPhone OS 1.0	iPhone OS 2.0	iPhone OS 3.0	iOS 4.0 (GSM version) iOS 4.2.5 (CDMA version)
Highest Supported operating system	iPhone OS 3.1.3	iOS 4.2.1	iOS 4.3.4 iOS 5.0 (Beta version)	iOS 4.3.4 (GSM version) iOS 4.2.9 (CDMA version) iOS 5.0 (Beta version)
Display	89 mm (3.5 in) glass LCD, 3:2 aspect ratio
	480 × 320 px (HVGA) at 163 ppi			960 × 640 px at 326 ppi
Storage	4, 8, or 16 GB	8 or 16 GB	8, 16, or 32 GB	16 or 32 GB
CPU Core / Processor	620 MHz (underclocked to 412 MHz)                         ARM 1176JZ(F)-S		833 MHz (underclocked to 600 MHz)           ARM Cortex-A8	1 GHz (underclocked to 800 MHz)      Apple A4
Graphics	PowerVR MBX Lite 3D GPU		PowerVR SGX535 GPU
Memory	128 MB DRAM		256 MB DRAM	512 MB DRAM
Connectivity	Wi-Fi (802.11b/g), USB 2.0/Dock connector, Quad band GSM/GPRS/EDGE (850, 900, 1800, 1900 MHz) Bluetooth 2.0 + EDR Cambridge Bluecore4	In addition to previous: Assisted GPS, Tri-band UMTS/HSDPA (850, 1900, 2100 MHz)[14], Includes earphones with mic	In addition to previous: 7.2 Mbit/s HSDPA, Voice Control, Digital compass, Nike+, Bluetooth 2.1 + EDR Broadcom 4325[15], Includes earphones with remote and mic	In addition to previous: Penta-band UMTS/HSDPA (800, 850, 900, 1900, 2100 MHz)[16][17], 5.76 Mbit/s HSUPA, 2.4 GHz 802.11n, 3-axis gyroscope, Dual-mic noise suppression, microSIM
				CDMA model: Dual-band CDMA/EV-DO Rev. A (800 1900 MHz)
Camera	2.0 MP, still images only		3.0 MP, 30 fps VGA video	Rear 5.0 MP, Front 0.3 MP (VGA),  30 fps 720p HD video
Audio codec	Wolfson Microelectronics WM8758BG	Wolfson Microelectronics WM6180C	Cirrus Logic CS42L61
Materials	Aluminum, glass and black plastic	Glass, plastic, and steel; black or white (white not available for 8 GB models)		Black or white aluminosilicate glass and stainless steel
Power	Built-in, non removable, rechargeable lithium-ion polymer battery
	3.7 V 1400 mA·h (5.18 W·h)	3.7 V 1150 mA·h (4.12 W·h)	3.7 V 1219 mA·h (4.51 W·h)	3.7 V 1420 mA·h (5.25 W·h)
Rated Battery life (hours)	Audio: 24 Video: 7 Talk over 2G: 8 Browsing Internet: 6 Standby: 250	Audio: 24 Video: 7 Talk over 3G: 5 Browsing over 3G: 5 Browsing over Wi-Fi: 9 Standby: 300	Audio: 30 Video: 10 Talk over 3G: 5 Browsing over 3G: 5 Browsing over Wi-Fi: 9 Standby: 300	Audio: 40 Video: 10 Talk over 3G: 7 Browsing over 3G: 6 Browsing over Wi-Fi: 10 Standby: 300
Dimensions	115×61×11.6 mm (4.5×2.4×0.46 in)	115.5×62.1×12.3 mm (4.5×2.4×0.48 in)		115.2×58.6×9.3 mm (4.5×2.31×0.37 in)
Weight	135 g (4.8 oz)	133 g (4.7 oz)	135 g (4.8 oz)	137 g (4.8 oz)
Released	4 and 8 GB: June 29, 2007 16 GB: February 5, 2008	11-Jul-08	16 and 32 GB: June 19, 2009 Black 8 GB: June 24, 2010	GSM (Black): June 24, 2010                          CDMA (Black): February 10, 2011         GSM and CDMA (White): April 28, 2011
Discontinued	4 GB: September 5, 2007 8 and 16 GB: July 11, 2008	16 GB: June 8, 2009 Black 8 GB: June 4, 2010	16 and 32 GB: June 24, 2010 Black 8 GB: In production	In production