Apple iPhone 4

NETWORK	Technology	GSM / HSPA
	2G bands	GSM 850 / 900 / 1800 / 1900
	3G bands	HSDPA 850 / 900 / 1900 / 2100
	Speed	HSPA 7.2/5.76 Mbps
	GPRS	Class 10
	EDGE	Class 10

LAUNCH	Announced	2010, June
	Status	Available. Released 2010, June

BODY	Dimensions	115.2 x 58.6 x 9.3 mm (4.54 x 2.31 x 0.37 in)
	Weight	137 g (4.83 oz)
	SIM	Micro-SIM
		- Scratch-resistant glass back panel

DISPLAY	Type	LED-backlit IPS LCD, capacitive touchscreen, 16M colors
	Size	3.5 inches (~54.0% screen-to-body ratio)
	Resolution	640 x 960 pixels (~330 ppi pixel density)
	Multitouch	Yes
	Protection	Corning Gorilla Glass, oleophobic coating

PLATFORM	OS	iOS 4, upgradable to iOS 7.1.1
	Chipset	Apple A4
	CPU	1 GHz Cortex-A8
	GPU	PowerVR SGX535

MEMORY	Card slot	No
	Internal	8/16/32 GB, 512 MB RAM

CAMERA	Primary	5 MP, 2592 x 1936 pixels, autofocus, LED flash, check quality
	Features	1/3.2'' sensor size, 1.75 µm pixel size, geo-tagging, touch focus, HDR photo
	Video	720p@30fps, check quality
	Secondary	VGA, 480p@30fps, videocalling over Wi-Fi only

SOUND	Alert types	Vibration, proprietary ringtones
	Loudspeaker	Yes
	3.5mm jack	Yes

COMMS	WLAN	Wi-Fi 802.11 b/g/n, hotspot
	Bluetooth	v2.1, A2DP
	GPS	Yes, with A-GPS
	Radio	No
	USB	v2.0

FEATURES	Sensors	Accelerometer, gyro, proximity, compass
	Messaging	iMessage, SMS (threaded view), MMS, Email, Push Email
	Browser	HTML5 (Safari)
	Java	No
		- Active noise cancellation with dedicated mic - iCloud cloud service - Maps - Audio/video player/editor - Photo viewer/editor - Voice memo - TV-out - Document viewer - Predictive text input

BATTERY		Non-removable Li-Po 1420 mAh battery
	Stand-by	Up to 300 h (2G) / Up to 300 h (3G)
	Talk time	Up to 14 h (2G) / Up to 7 h (3G)
	Music play	Up to 40 h

MISC	Colors	Black, White
	SAR US	1.17 W/kg (head)     1.11 W/kg (body)
	SAR EU	0.93 W/kg (head)     0.74 W/kg (body)
	Price group

TESTS	Display	Contrast ratio: 1242:1 (nominal) / 2.016:1 (sunlight)
	Camera	Photo / Video
	Loudspeaker	Voice 65dB / Noise 60dB / Ring 66dB
	Audio quality	Noise -90.1dB / Crosstalk -89.6dB

Apple announced the arrival of the eagerly anticipated iPhone 4 in June 2010 with an improved 5Mp camera sensor, an extra 2Mp offered by the iPhone 3. There are now phones available with sensors comparable with those on compact cameras but as there is now a large number of photography related apps now available for the iPhone there is a vast potential for creativity.

Apple iPhone 4 camera: Features

• 5Mp sensor
• 5x digital zoom
• Camera on front and back
• Video recording, HD (720p) up to 30 frames per second with audio
• VGA-quality photos (0.3Mp) and video at up to 30 frames per second with the front camera
• Tap to focus video or still images
• LED flash
• Photo and video geotagging

Apple iPhone 4 camera: Handling

At 9.3mm thin, the iPhone 4 is the world’s thinnest smartphone. The iPhone 4 is built with aluminosilicate glass and is 20 times stiffer and 30 times harder than plastic and the glass is extremely durable and scratch resistant. The iPhone 4 is also very light and fits snugly into your pocket.

The 960 x 640 LCD display has 326 pixels per inch, therefore text and images are extremely sharp and IPS technology provides excellent colour and contrast from almost any viewing angle. The LCD display also doubles up as a touch screen, with very few buttons on the phone itself. The touch screen is easy to use and responds extremely well.

There are very few options available within the camera app that comes pre installed on the iPhone 4. There are options to adjust the flash setting, turn HDR mode on/off, switch between the front and back cameras, switch to video mode and the shutter release button. There are other apps available which offer a self-timer, burst mode and other settings which are familiar on compact cameras.

Apple iPhone 4 camera: Performance

Detail in the wide-angle shot below is good throughout, with colours being punchy and saturated. Although the images aren't going to be suitable for large prints they will be great if you like to print your photos at 7x5in or 6x4in for your photo albums and will make a decent A4 print in ideal shooting conditions. Images produced look great on social networking sites such as Facebook.

The iPhone 4 has digital rather than optical zoom. The telephoto image below has been shot using the full 5x digital zoom available. As the image was shot using a tripod the image is sharp with plenty of detail but it is difficult to take a sharp picture when taking a shot hand-held with the 5x digital zoom.

ISO and noise performance

It is impossible to set the ISO speed yourself on the iPhone 4. It is set automatically and is rumoured to be between ISO80 and ISO1000. Given that many compact cameras now have an ISO speed of at least ISO3200 then you'd expect it to be difficult to take sharp pictures in low-light, especially without the use of the flash. Using our studio test chart noise has been handled really well giving a good sharp image.

White-balance

Similarly to the ISO setting, the white-balance cannot be adjusted by the user on the iPhone 4. Under both the tungsten and fluorescent lights in our studio the iPhone 4 does a really good job at adjusting for the light. The fluorescent lights give a very slight magenta cast but the AWB has performed better than I have seen from some compact cameras.

Apple iPhone 4 camera: Sample images & video

Unlike most compact cameras, the iPhone doesn't have a set of scene modes available. There is a HDR mode which blends the best parts of three separate exposures into a single photo. In the example below there is clearly more detail retained in the window when using the HDR mode. The best results when using the flash are when shooting close-up items as when capturing an object in the distance, the resulting images look washed out.