When the newiPhone 4arrives June 24 , an update operating system will be waiting to greet it . Apple plan to roll out the next major version of its roving O in two weeks , the society confirmed on Monday .

Apple showcased its planned iPhone bone update during Monday ’s Worldwide Developers Conference keynote . And while the presentment largely covered the same ground Apple went over when it first unveiled the update ’s major features in April , chief executive officer Steve Jobs offered a few new tidbits — a newfangled name for the OS as well as support for video calling feature with the latest iPhone .

The OS , which fly the coop on the iPhone , iPod touch , and iPad , has been renamed iOS 4.0 — a smart move given the number of mobile devices Apple now offers . Later this month , Jobs sound out , Apple will sell its 100 millionth machine that runs its roving OS . With more than2 million iPadssold in the last two month and iPod cutaneous senses sale going strong , it ’s clear that Apple ’s mobile O powers more than just a smartphone .

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iOS 4.0 will support the new FaceTime video-calling feature for the iPhone 4.

iOS 4 offers more than 1500 APIs for developers as well as 100 new feature aim at end substance abuser . Jobs demonstrated a few on Monday , though what he showed off would n’t derive as a surprisal to anyone familiar with what was previewed in April . As with that issue , the OS ’s new multitasking features were put on video display — Jobs played a song using the Pandora euphony - stream app while he also flip back and forth between the Mail and Safari apps.iOS ’s take on multitaskinginvolves a combination of app - switch features and background processes managed by the operating arrangement itself . Apple repugn that this is a much more barrage - friendly way to run multiple apps — a point Jobs accent Monday when he bring up a quotation mark from Google ’s Larry Page about how software lead in the backdrop can sap battery life .

“ Yes , it does , ” Jobs told WWDC attender . “ Unless you do it good . ”

Other Io features Jobs revisit on Monday included pamphlet for organizing software , a unified Mail inbox , and a new Game Center social web platform . The OS update will also include enhance tv camera feature film — namely 5x digital rapid growth and a tap - to - focus feature for shooting video — as well as Faces and Places support in the Photos app . Other feature include the ability to alter the setting wallpaper on your iPhone ’s home screen ; a build - in spell - checker for Mail , Notes , and other apps ; usance playlist existence on your iPhone ; and wireless keyboard support . iBooks , the e - reader software for the iPad , will also be available for the iPhone , as part of aforthcoming updateannounced Monday in conjunction with iOS 4 ’s release .

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iOS 4.0 will support the new FaceTime video-calling feature for the iPhone 4.

For enterprise users , Jobs announce that Io 4.0 would offer beneficial data point protection , mobile gimmick management , wireless app dispersion , multiple Exchange accounts , Exchange Server 2010 , SSL VPN support .

Jobs also took time during his presentation to developers to bring out more detail about iAd , the new iOS 4 SDK feature that allow developers to plant publicizing in iPhone apps . The ads hunt down inside the app , so users do n’t leave the app if they tap on the advertizement . Users can also apply in - advertizing buying to bribe content from iTunes immediately . grant to Jobs , companionship that have already signalize on to Apple ’s young ad internet include Best Buy , DirecTV , JCPenney , and Target .

Monday ’s iOS 4 preview did admit talk of some novel features , one of which was tied in with the iPhone 4 annunciation . iOS 4 bear out FaceTime , the video - chatting feature that will debut with the new iPhone .

iOS 4.0 will support the unexampled FaceTime picture - call feature film for the iPhone 4 .

A FaceTime button in a phone call allows iPhone 4 users to enable face - to - face video conversation , something Jobs said he grow up “ just dreaming about . ” FaceTime bring between two caller using the fresh iPhones ( though Apple intends to give - source the standard so any telephone set can use it ) . you’re able to flip between front and rear - facing cameras in the heart of the call . While iPhone birdsong are placed over a cellular web , FaceTime will only mold if Wi - Fi is present as well to interchange the genuine telecasting portion .

“ This is one of those moment that reminds us why we do what we do , ” Jobs said .

Confirming many rumors from the past few months , Apple has also add up Bing as a Safari hunt option alongside Yahoo . “ Microsoft ’s done a really nice job on this , ” Jobs severalize keynote attendees . Google remains the default , however , but drug user can easily transfer this context in the options app .

Jobs wrapped his iOS 4.0 introduction by announce that developer can download the Gold Master Candidate work up Monday .

iOS 4.0 will be available June 21 as a free update for the iPhone 3 G and 3GS , as well as to the second- and third - generation iPod touch ; note that the 3 thou and second - propagation touch do n’t sustain the multitasking feature . The update will be available for the iPad after this nightfall .

Updated at 5:54 p.m. PT with more detail about Monday ’s iOS 4 demo . Updated at 9:18 p.m. PT with information on iAd .

Macworld intern Blair Hanley Frank add to this account .

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