Iphone

Thursday, September 11, 2008

iphone

The Apple iPhone is an internet connected multimedia smartphone with a flush multi-touch screen and a minimal hardware interface. Lacking a physical keyboard, a virtual keyboard is rendered on the touch screen. The iPhone's functions include those of a camera phone and portable media player (equivalent to the iPod) in addition to text messaging and visual voicemail. It also offers Internet services including e-mail, web browsing, and local Wi-Fi connectivity. The first generation phone hardware was quad-band GSM with EDGE; the second generation also adds UMTS with HSDPA.

Apple announced the iPhone on January 9, 2007. The announcement was preceded by rumors and speculation that circulated for several months. iPhone was initially introduced in the United States on June 29, 2007 and is in the process of being introduced worldwide. It was named Time magazine's Invention of the Year in 2007. July 11, 2008, the iPhone 3G was released and supported faster 3G data speeds and Assisted GPS.

Hardware

Screen and interface

The 9 cm (3.5 in) liquid crystal display (320×480 px at 6.3 px/mm, 160 ppi) HVGA touchscreen with scratch-resistant glass is specifically created for use with a finger, or multiple fingers for multi-touch sensing. Because the screen is a capacitive touchscreen, bare skin is required; a stylus or a normal glove prevents the necessary electrical conductivity.

Almost all input is given through the touch screen, which understands complex gestures using multi-touch. The iPhone user interface enables the user to move the content itself up or down by a touch-drag motion of the finger. For example, zooming in and out of web pages and photos is done by placing two fingers on the screen and spreading them farther apart or bringing them closer together. Similarly, scrolling through a long list in a menu works as if the list is pasted on the outer surface of a wheel: the wheel can be "spun" by sliding a finger over the display from bottom to top (or vice versa). In either case, the list continues to move based on the flicking motion of the finger, slowly decelerating as if affected by friction. In this way, the interface simulates the physics of a real 3D object. There are other visual effects, such as horizontally sliding sub-selections and co-selections from right and left, vertically sliding system menus from the bottom (e.g. favorites, keyboard), and menus and widgets that turn around to allow settings to be configured on their back sides.

The display responds to three sensors. A proximity sensor shuts off the display and touchscreen when the iPhone is brought near the face to save battery power and to prevent inadvertent inputs from the user's face and ears. An ambient light sensor adjusts the display brightness which in turn saves battery power. A 3-axis accelerometer senses the orientation of the phone and changes the screen accordingly. Photo browsing, web browsing, and music playing support both upright and left or right widescreen orientations, while videos play in only one widescreen orientation.[citation needed]

A software update allowed the first generation iPhone to use cell towers and Wi-Fi networks to locate itself despite lacking a hardware GPS. The iPhone 3G includes A-GPS but also uses cell towers and Wi-Fi for location finding.

A single "home" hardware button below the display brings up the main menu. Subselections are made via the touchscreen. The iPhone utilizes a full-paged display, with context-specific submenus at the top and/or bottom of each page, sometimes depending on screen orientation. Detail pages display the equivalent of a "Back" button to return to the parent menu.

The iPhone has three physical switches on its sides: wake/sleep, volume up/down, and ringer on/off. These are made of plastic on the original iPhone and metal on the iPhone 3G. All other multimedia and phone operations are done via the touchscreen. The iPhone 3G features a full plastic back to increase GSM signal strength.[citation needed] It also comes in white exclusively for the 16GB model.

Audio

The iPhone's headphones are similar to those of most current smartphones, incorporating a microphone. A multipurpose button in the microphone can be used to play or pause music, skip tracks, and answer or end phone calls without touching the iPhone. The 3.5 mm TRS connector for the headphones is located on the top left corner. The headphone socket on the original iPhone is recessed into the casing. The recess is narrow when compared to many headphone jacks, making them incompatible without the use of an adapter. The iPhone 3G has a flush mounted headphone socket.

Wireless earpieces that use Bluetooth technology to communicate with the iPhone are sold separately. It does not support stereo audio.

The loudspeaker is used both for handsfree operations and media playback, but does not support voice recording.

Composite or component video at up to 576i and stereo audio can be output from the dock connector using an adapter sold by Apple.

Battery

The iPhone features a built-in rechargeable battery that is not user-replaceable, similar to existing iPods, but dissimilar to most existing cellular phones. the battery prematurely reaches the end of its life, the phone can be returned to Apple and replaced for free while still in warranty, one year at purchase and extended to two years with AppleCare. The cost of having Apple provide a new battery and replace it when the iPhone is out of warranty is, in the United States, US$79 and US$6.95 for shipping.

Since July 2007 third party battery packs have been available at a much lower price than Apple's own battery replacement program. These kits often include a small screwdriver and an instruction leaflet, but as with many newer iPod models the battery in the original iPhone has been soldered in. Therefore a soldering iron is required to install the new battery. This is not the case with the iPhone 3G as it uses a different battery fitted with a connector.

The original iPhone's battery was stated to be capable of providing up to seven hours of video, six hours of web browsing, eight hours of talk time, 24 hours of music or up to 250 hours on standby. Apple's site says that the battery life "is designed to retain up to 80% of its original capacity after 400 full charge and discharge cycles", which is comparable to the iPod batteries.

The iPhone 3G's battery is stated to be capable of providing up to seven hours of video, six hours of web browsing on Wi-Fi or five on 3G, ten hours of 2G talk time, or five on 3G, 24 hours of music, or 300 hours of standby.

The Foundation for Taxpayer and Consumer Rights, a consumer advocate group, has sent a complaint to Apple and AT&T over the fee that consumers have to pay to have the battery replaced. Though the battery replacement service and its pricing was not made known to buyers until the day the product was launched, a similar service had been well established for the iPods by Apple and various third party service providers.

SIM card

The SIM card is located in a slot at the top of the device, which can be ejected with a paperclip or a SIM card ejection tool which is included with the iPhone 3G. In most countries, the iPhone is usually sold with a SIM lock preventing the use of SIM cards from different mobile networks.

Storage

The iPhone was initially released with two options for internal storage size; either a 4 GB or 8 GB flash drive (manufactured by Samsung) model was available. On September 5, 2007, Apple announced they were discontinuing the 4 GB models. On February 5, 2008, Apple announced the addition of a 16 GB model to the iPhone lineup. The iPhone does not contain any memory card slots for expanded storage.

Included items and accessories

Both the iPhone and the iPhone 3G came with a series of included accessories and items when purchased.

Items common to both versions

* Documentation
* Stereo headset with microphone
* Dock connector to USB cable (standard USB cable for connection)
* Cleaning/polishing cloth

Original iPhone

* Dock
* Standard USB power adapter

iPhone 3G

* SIM ejector tool
* Mini USB power adapter (North America)
* Standard USB power adapter (Everywhere except North America)

Software

Main article: iPhone OS

iPhone OS is the operating system that runs on the iPhone and iPod touch. It is based on a variant of the same basic Mach kernel that is found in Mac OS X. iPhone OS includes the software component "Core Animation" from Mac OS X v10.5 which, together with the PowerVR MBX 3D hardware, is responsible for the smooth animations used in its user interface. The operating system takes up considerably less than half a GB of the device's total 8 GB or 16 GB storage.[It will be capable of supporting bundled and future applications from Apple.

Like an iPod, the iPhone is managed with iTunes version 7.3 or later, which is compatible with Mac OS X version 10.4.10 or later, and 32-bit Windows XP or Vista. The release of iTunes 7.6 expanded this support to include 64-bit versions of XP and Vista, and a workaround has been discovered for previous 64-bit Windows operating systems.

The iPhone's applications cannot simply be copied from Mac OS X and have to be written and compiled specifically for the iPhone. Additionally, the Safari web browser supports web applications written with AJAX.

Applications

There are several applications located on the Home screen: Text (SMS messaging), Calendar, Photos, Camera, YouTube, Stocks, Maps (Google Maps), Weather, Clock, Calculator, Notes, Settings, and iTunes (store). Four other applications, docked at the base of the screen, delineate the iPhone's main purposes: Phone, Mail, Safari, and iPod.

The YouTube application streams videos over Wi-Fi, 2G, or 3G after encoding them using the open H.264 codec, to which YouTube has converted about 10,000 videos. As a result, the YouTube application on iPhone can currently view only a certain selection of videos from the site.

At WWDC 2007 on June 11, 2007 Apple announced that the iPhone will support third-party "applications" via the Safari web browser that share the look and feel of the iPhone interface. On October 17, 2007, Steve Jobs, in an open letter posted to Apple's "Hot News" weblog, announced that a software development kit (SDK) would be made available to third-party developers in February 2008. Due to security concerns and Jobs' praise of Nokia's digital signature system, it was suggested that Apple would adopt a similar method. The SDK will also allow application development for the iPod touch.[61] The iPhone SDK was officially announced on March 6, 2008, at the Apple Town Hall facility. The SDK will allow developers to develop native applications for the iPhone and iPod touch, as well as test them in an "iPhone simulator". However, loading an application onto the devices is only possible after paying a Apple Developer Connection membership fee. Developers are free to set any price for their applications to be distributed through the App Store, of which they will receive a 70 percent share Developers can also opt to release the application for free and will not pay any costs to release or distribute the application beyond the membership fee. The SDK was made available immediately, while the launch of applications had to wait until the firmware update which was released on July 11, 2008. update is free for iPhone users and there is a charge for iPod touch owners.

Once a developer has submitted his/her application to the App Store, Apple holds firm control over its distribution. For example, Apple can halt the distribution of applications it deems inappropriate as has happened with a $1000 program that has as sole purpose to demostrate the wealth of its user. strikingly, Apple also installs a kill switch in the programs it distributes through the App store: all applications can be remotely disabled at Apple's command. The company considers it irresponsible not to have this kind of control over the software the user runs.

Many third-party Safari "applications" and un-signed native applications are also available. he ability to install native applications onto the iPhone outside of the App Store will not be supported by Apple. Such native applications could be broken by any software update, but Apple has stated it will not design software updates specifically to break native applications other than applications that perform SIM unlocking.

Software updates

Apple provides free updates to the iPhone's operating system through iTunes, in a similar fashion to the way that iPods are updated. Security patches, as well as new and improved features, are released in this fashion.

Features

The iPhone allows audio conferencing, call holding, call merging, caller ID, and integration with other cellular network features and iPhone functions. Voice dialing and video calling are not supported by the iPhone.

The iPhone includes a visual voicemail feature allowing users to view a list of current voicemail messages on-screen without having to call into their voicemail. Unlike most other systems, messages can be listened to and deleted in a non-chronological order by choosing any message from an on-screen list. AT&T, O2, T-Mobile Germany, and Orange modified their voicemail infrastructure to accommodate this new feature designed by Apple. A lawsuit has been filed against Apple and AT&T by Klausner Technologies Inc. claiming the iPhone's visual voicemail feature infringes two patents.[dead link]

A music ringtone feature was introduced in the United States on September 5, 2007. For a fee equal to the price of the song on iTunes, the user is allowed to create their custom ringtones. It is not yet available in all countries where the iPhone has been released. The ringtones can be from 3 to 30 seconds in length of any part of a song, can include fading in and out, can pause from half a second to five seconds when looped, and never expire. All customizing can be done in iTunes, and the synced ringtones can also be used for alarms on the iPhone. Custom ringtones can also be created using Apple's GarageBand software 4.1.1 or later (available only on Mac OS X) and third-party tools.

Multimedia

The layout of the music library is similar to iPods and current Symbian S60 phones, with the sections divided more clearly alphabetically, and with a larger font. Just like iPods, the iPhone can sort its media library by songs, artists, albums, videos, playlists, genres, composers, podcasts, audiobooks, and compilations. Cover Flow, like that on iTunes, shows the different album covers in a scroll-through photo library. Scrolling is achieved by swiping a finger across the screen.

The iPhone supports gapless playback.

Like the fifth generation iPods introduced in 2005, the iPhone can play video, allowing users to watch TV shows and films. Unlike other image-related content, video on the iPhone plays only in the landscape orientation, when the phone is turned sideways. Double tapping switches between wide-screen and full-screen video playback.

The iPhone allows users to purchase and download songs from the iTunes Store directly to their iPhone over Wi-Fi with the iTunes Wi-Fi Music Store, but not over the cellular data network.

Internet connectivity

Internet access is available when the iPhone is connected to a local area Wi-Fi or a wide area GSM or EDGE network, both second-generation (2G) wireless data standards. The iPhone 3G supports third-generation UMTS and HSDPA, but not HSUPA networks. Steve Jobs had stated in September 2007 that 3G would need to become more widespread in the United States and 3G chipsets would need to become much more energy efficient before inclusion in the iPhone. is not clear whether it supports HSDPA 3.6 or HSDPA 7.2.[citation needed] By default, the iPhone will ask to join newly discovered Wi-Fi networks and prompt for the password when required, while also supporting manually joining closed Wi-Fi networks.[ Wi-Fi is active, the iPhone will automatically switch from the EDGE network to any nearby previously approved Wi-Fi network.[ 802.1X is supported by the iPhone OS version 2.0, which is used by many university and corporate Wi-Fi networks.

The ubiquitous Internet connection offered by the iPhone has been widely utilized by users. According to Google, the iPhone generates 50 times more search requests than any other mobile handset. to Deutsche Telekom CEO René Obermann, "The average Internet usage for an iPhone customer is more than 100 MBytes. This is 30 times the use for our average contract-based consumer customers."

The iPhone is able to access the World Wide Web via a modified version of the Safari web browser. Web pages may be viewed in portrait or landscape mode and supports automatic zooming by pinching together or spreading apart fingertips on the screen, or by double-tapping text or images. The web browser displays complete web pages similar to a desktop web browser and supports zooming by double-tapping the screen.

The iPhone does not support Flash nor Java technology.

According to AT&T, the iPhone 3G has a maximum download rate of 1.4Mbp/s.

Apple developed an iPhone application for accessing Google's maps service in map, satellite or hybrid form, a list of search results, or directions between two locations, while providing optional real-time traffic information. During the product's announcement, Jobs demonstrated this feature by searching for nearby Starbucks locations and then placing a prank call to one with a single tap. Though Flash isn't supported in Safari on the iPhone, Apple also developed a separate application to view YouTube videos on the iPhone, similar to the system used for the Apple TV.

E-mail

The iPhone also features an e-mail program that supports HTML e-mail, which enables the user to embed photos in an e-mail message. PDF, Word, Excel, and Powerpoint attachments to mail messages can be viewed on the phone. Apple's MobileMe platform offers push email, which emulates the functionality of the popular BlackBerry email solution, for an annual subscription. Yahoo! offers a free push-email service for the iPhone. IMAP (although not Push-IMAP) and POP3 mail standards are also supported, including Microsoft Exchange and Kerio MailServer. In the first versions of the iPhone firmware, this was accomplished by opening up IMAP on the Exchange server. Apple has also licensed Microsoft ActiveSync and now supports the platform (including push email) with the release of iPhone 2.0 firmware. The iPhone will sync e-mail account settings over from Apple's own Mail application, Microsoft Outlook, and Microsoft Entourage, or manually configured using the device's Settings tool. With the correct settings, the e-mail program can check almost any IMAP or POP3 account.

Camera

The iPhone features a built in 2.0 megapixel camera located on the back for still digital photos. It has no optical zoom, flash or autofocus, and does not support video recording.

The iPhone includes software that allows the user to upload, view, and e-mail photos. The user zooms in and out of photos by "unpinching" and "pinching" them through the multi-touch interface. The software interacts with iPhoto and Aperture software on the Mac and Photoshop software in Windows. In version 2.0 of the iPhone OS, users can choose to allow location data to be embedded in the pictures producing geocoded photographs (geotagging).

Others

The built-in Bluetooth 2.x+EDR supports wireless earpieces, which requires the HSP profile, but notably does not support stereo audio (requires A2DP), laptop tethering (requires DUN and SPP), or the OBEX file transfer protocol (requires FTP, GOEP, and OPP). The lack of these profiles prevent iPhone users from exchanging multimedia files with other bluetooth-enabled cell phones, including pictures, music and videos.

Text messages are presented chronologically in a mailbox format similar to Mail, which places all text from recipients together with replies. Text messages are displayed in speech bubbles (similar to iChat) under each recipient's name. The iPhone currently has built-in support for e-mail message forwarding, drafts, and direct internal camera-to-e-mail picture sending. However, it does not yet have capabilities for delivery reports, MMS, or copy/cut/paste.[90] Support for multi-recipient SMS was added in the January 2008 (v1.1.3) software update.

Text input

For text input, the device implements a virtual keyboard on the touchscreen. It has automatic spell checking and correction, predictive word capabilities, and a dynamic dictionary that learns new words. The predictive word capabilities have been integrated with the dynamic virtual keyboard so that users will not have to be extremely accurate when typing—i.e. touching the edges of the desired letter or nearby letters on the keyboard will be predictively corrected when possible. The keys are somewhat larger and spaced farther apart when in landscape mode, currently available using the Safari web browser and certain third-party applications with Landscape Mode support. Not focusing more on texting has been considered a chief weakness of the iPhone, while at the same time others believe the virtual keyboard to be a bold step and a worthwhile risk. The lack of a physical keyboard allows for the keyboard to be optimized for different applications and languages.

Accessibility

According to Apple's accessibility statement "effective use of the iPhone 3G requires a minimal level of visual acuity, motor skills, and an ability to operate a few mechanical buttons. Use of iPhone 3G by someone who relies solely on audible and tactile input is not recommended." The iPhone 3G can be used with external TDD/TTY devices using a separately purchased adaptor cable. The iPhone 3G has not been rated under the United States Federal Communication Commission guidelines for hearing aid compatibility at either level M3 or T3.

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1 comments:

Unknown November 1, 2008 at 5:28 PM  

I just love this phone...I do know it has a few problems like lack of video recording,etc.But still i like it a lot. :)

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