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Apple iPad 4 vs Apple iPad 2 Wi-Fi

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Apple iPad 4 Remove phone

phone
PA Rating - 9
Posted: 23 Oct 2012
Market Status: Released US carrier availability: Verizon - Available (since 02 Nov 2012) AT&T - Available (since 02 Nov 2012) Sprint - Available (since 26 Nov 2012)

Apple iPad 2 Wi-Fi Remove phone

phone
Also known as Apple iPad 2,4 PA Rating - 8.5
User Rating - 7.8

Posted: 02 Mar 2011
Market Status: Released

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Design
Device typeTabletTablet 
OSiOS (6.1, 6)iOS (6.1, 6, 5.1, 5, 4.x) 
Form factorCandybarCandybar 
Dimensions9.50 x 7.31 x 0.37 inches (241.2 x 185.7 x 9.4 mm)9.50 x 7.31 x 0.34 inches (241.2 x 185.7 x 8.8 mm) 
Weight23.35 oz (662 g)
the average is 4.4 oz (127 g)		21.20 oz (601 g)
the average is 4.4 oz (127 g)		 
Side KeysRight: Volume control, OtherRight: Volume control, Other 
ColorsBlack, WhiteBlack, White 
Display
Physical size9.7 inches9.7 inches 
Resolution2048 x 1536 pixels1024 x 768 pixels 
Pixel density

Pixel density - The pixel density of a display represents the number of pixels over an area of one inch. It’s measured in “pixels per inch”, or ppi. The higher the number, the more detailed and good-looking the display is.

264 ppi132 ppi 
Technology

Technology - There are two main screen technologies currently used in phones and tablets: LCD and AMOLED. The former usually features a light source and liquid crystals, while the latter is based on organic light-emitting diodes. Newer LCD variations like IPS-LCD and Super-LCD allow for very accurate color reproduction and very wide viewing angles, where no significant image quality loss is observed. Current AMOLED screens differ in such a way that they can exhibit much more saturated colors (sometimes too much) and incredibly high contrast levels, which is due to black color being completely black in AMOLED displays.

IPS LCDIPS LCD 
Colors16 777 216  
TouchscreenCapacitive, Multi-touchCapacitive, Multi-touch 
FeaturesLight sensorLight sensor 
Battery
Capacity 6944 mAh 
TypeLi - PolymerLi - Polymer 
Not user replaceableYesYes 
Hardware
System chip

System chip - Most modern handsets use an advanced chip that includes many of the device’s hardware modules like the processor, Wi-Fi, Bluetooth and sometimes even the wireless radio. This field shows what particular system chip (or System-on-a-Chip) is used in the phone.

Apple A6XApple A5 
Processor

Processor - The processor is the main computing component of a phone and is a major factor when it comes to the overall speed of the device. Some more powerful smartphones use dual-core and quad-core processors designed to deliver greater performance.

Dual core, 1400 MHz, Apple SwiftDual core, 1000 MHz, ARM Cortex-A9 
Graphics processorPowerVR SGX 554PowerVR SGX543MP2 
System memory

System memory - System memory, or RAM memory is the type of memory that the device uses to temporarily store data from the OS or currently-running apps. The more RAM available to the device, the better the performance will be when multiple or heavier programs are running.

1024 MB RAM512 MB RAM / DDR2 
Built-in storage16 GB64 GB 
Camera
Camera5 megapixels0.7 megapixels 
Aperture size

Aperture size - The aperture of a camera is the opening through which light travels before it reaches the camera sensor. The smaller the number is, the bigger this opening is, allowing for more light to pass.

F2.4  
FeaturesBack-illuminated sensor (BSI), Auto focus, Touch to focus, Face detection, Geo tagging  
Camcorder1920x1080 (1080p HD) (30 fps)1280x720 (720p HD) (30 fps) 
FeaturesDigital image stabilizationVideo calling 
Front-facing camera1.2 megapixels0.3 megapixels VGA 
Video capture1280x720 (720p HD)  
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Multimedia
Music player   
Filter byAlbum, Artist, Genre, PlaylistsAlbum, Artist, Genre, Playlists 
FeaturesAlbum art cover, Background playback, Dolby DigitalAlbum art cover, Background playback 
Supported formatsMP3, AAC, eAAC, eAAC+, WAV, M4A (Apple lossless)MP3, AAC, M4A (Apple lossless) 
Video playback   
Supported formatsMPEG4, H.264, Motion JPG, MOVMPEG4, H.264, Motion JPG, MOV 
SpeakersLoudspeaker  
YouTube playerYesYes 
Internet browsing
BrowserSafari  
supportsHTML, HTML5HTML, HTML5 
Built-in online services supportFacebook, YouTube (upload), Flickr, TwitterYouTube (upload) 
Technology
GSM850, 900, 1800, 1900 MHz  
UMTS850, 900, 1900, 2100 MHz  
LTE700 MHz Class 17, 1700/2100 MHz  
DataLTE Cat3 Downlink 100 Mbit/s, HSDPA+ (4G) 42.2 Mbit/s, HSDPA+ (4G) 21.1 Mbit/s, UMTS, EDGE, GPRS  
Micro SIMYes  
Global Roaming Yes 
Positioning

Positioning - This field shows the positioning systems supported by the device. There are three main types: GPS, A-GPS and GLONASS. GPS - This is one of the most widespread global positioning technologies, developed and maintained by the U.S. government. It uses satellites in order to detect your location. Works best in clear weather. A-GPS - A-GPS stands for Assisted GPS and is the industry standard for positioning and navigation. “Assisted” means that it can use local wireless networks, in addition to satellites, for quicker and more precise localization. GLONASS - GLONASS is a global positioning system, developed by the Russian Federation. It’s very similar to GPS, but isn’t so popular in cell phones.

A-GPS, Glonass, Wi-Fi positioning  
NavigationYes  
Phone features
PhonebookUnlimited entries  
OrganizerCalendar, Alarm, Document viewer (Office 2007, Office 2003, PDF, Other, .jpg, .tiff, .htm, .html, .key, .numbers, .pages, .txt, .vcf), CalculatorCalendar, Document viewer (Office 2007, Office 2003, PDF) 
Messaging Predictive text input 
E-mailIMAP, POP3, SMTP, Microsoft ExchangeYes 
Instant MessagingYesYes 
Games Yes 
Connectivity
Bluetooth4.02.1, EDR 
Wi-Fi802.11 a, b, g, n, n 5GHz802.11 a, b, g, n 
Mobile hotspotYes  
USBYesYes 
ConnectorProprietaryProprietary 
FeaturesUSB Host  
Headphones connector3.5mm3.5mm 
HDMIYesYes 
Charging connectorProprietaryProprietary 
OtherTV-Out, Computer sync, OTA syncTV-Out, Computer sync, OTA sync 
Other features
NotificationsSilent mode, SpeakerphoneSilent mode, Speakerphone 
SensorsAccelerometer, Gyroscope, CompassAccelerometer, Gyroscope, Compass 
OtherVoice commands, Voice recordingVoice recording 
Regulatory Approval
FCC approval

FCC approval - The Federal Communications Commission (FCC) is an independent United States government agency, directly responsible to Congress. The FCC was established by the Communications Act of 1934 and is charged with regulating interstate and international communications by radio, television, wire, satellite and cable. The FCC's jurisdiction covers the 50 states, the District of Columbia, and U.S. possessions. Every wireless phone device that that is sold in the U.S. has to be tested and approved for sale by the FCC.

   
Date approved

Date approved - Shows the date when the particular phone is approved by the Federal Communications Commission

 02 Mar 2011 
 FCC ID value: BCGA1395 link 
FCC measured SAR

FCC measured SAR - The exposure standard for mobile devices employs a unit of measurement known as the Specific Absorption Rate, or SAR. The SAR limit stated in the international guidelines is 2.0 W/ kg*. Tests for SAR are conducted using standard operating positions with the device transmitting at its highest certified power level in all tested frequency bands. Although the SAR is determined at the highest certified power level, the actual SAR of the device while operating can be well below the maximum value.

   
Body 0.99 W/kg 
Availability
Officially announced23 Oct 201202 Mar 2011 
Shopping information
MSRP price   
$ 629  

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