Windows Phone(abbreviated asWP) is a series ofproprietarysmartphoneoperating systemsdeveloped byMicrosoft. It is the successor to Windows Mobile,although it is incompatible with the earlier platform.With Windows Phone, Microsoft created a new user interface, featuring adesign languagenamed "Modern" (which was formerly known as "Metro").Unlike its predecessor, it is primarily aimed at the consumer market rather than theenterprisemarket.It was first launched in October 2010 withWindows Phone 7. The latest release isWindows Phone 8, which was launched in October 2012.

DevelopmentWork on a majorWindows Mobileupdate may have begun as early as 2004 under the codename "Photon", but work moved slowly and the project was ultimately cancelled. In 2008, Microsoft reorganized the Windows Mobile group and started work on a new mobile operating system.[10]The product was to be released in 2009 as Windows Phone, but several delays prompted Microsoft to develop Windows Mobile 6.5 as an interim release.[11]Windows Phone was developed quickly. One result was that the new OS would not be compatible with Windows Mobile applications. Larry Lieberman, senior product manager for Microsoft's Mobile Developer Experience, toldeWeek: "If we'd had more time and resources, we may have been able to do something in terms of backward compatibility." Lieberman said that Microsoft was attempting to look at the mobile phone market in a new way, with theend userin mind as well as the enterprise network.[12]Terry Myerson, corporate VP of Windows Phone engineering, said, "With the move to capacitive touch screens, away from the stylus, and the moves to some of the hardware choices we made for the Windows Phone 7 experience, we had to break application compatibility with Windows Mobile 6.5."

Launch and expansionWindows Phone 7

Windows Phone 7.5 logo

Windows Phone 7 was announced atMobile World Congressin Barcelona, Catalonia, Spain, on February 15, 2010, and released publicly on November 8, 2010 in theUnited States.Microsoft released an updated version of Windows Phone 7,Mango(also referred to as Windows Phone 7.5), in May 2011. The update included a mobile version ofInternet Explorer 9that supports the same web standards and graphical capability as the desktop version,multi-taskingof third-party apps, Twitter integration for the People Hub, andWindows Live SkyDriveaccess. A minor update released in 2012 known as "Tango", along with other bug fixes, lowered the hardware requirements to allow for devices with 800MHz CPUs and 256 MB of RAM to run Windows Phone. In January 2013, Windows Phone 7.8 was released. It added some features from Windows Phone 8, such as an updated start screen, doubling of the color scheme options to 20 and the option to have the Bing image of the day as the lock screen wallpaper. Windows Phone 7.8 was intended to prolong the life of older Windows Phone 7 devices, as these were not upgradable to Windows Phone 8 due to hardware limitations. However, not all users have received the Windows Phone 7.8 update yet.Microsoft has announced that Windows Phone 7.8 will see further future updates and as both Windows Phone 7 and Windows Phone 8 will coexist for sometime, to support devices in different price ranges.Windows Phone 8

Three high-end Windows Phone 8 devices from left to right:HTC 8X,Lumia 920,Lumia 820.On October 29, 2012, Microsoft releasedWindows Phone 8, a new generation of the operating system. Windows Phone 8 replaces its previously Windows CE-based architecture with one based on theWindows NTkernel with many components shared withWindows 8, allowing applications to be easily ported between the two platforms.Hardware supportWindows Phone 8, while adding a number of software improvements, also brought support for updated hardware. This included support formulti-core processorsand high resolution screens.[21]Windows Phone 7 and 7.5 were often criticized for a lack of high end hardware support, but Windows Phone 8's new hardware gave Windows Phone the ability to better compete with Google and Apple smartphones.[22]

Partnership with NokiaOn February 11, 2011, at a press event in London, Microsoft CEOSteve BallmerandNokiaCEOStephen Elopannounced a partnership between their companies in which Windows Phone would become the primary smartphone operating-system for Nokia, replacingSymbian.The event focused largely on setting up "a new global mobile ecosystem", suggesting competition withAndroidandiOSwith the words "It is now a three horse race". Elop's stated the reason for choosing Windows Phone over Android, saying: "the single most important word is 'differentiation'. Entering theAndroidenvironment late, we knew we would have a hard time differentiating."While Nokia would have had more long-term creative control with Android (note thatMeeGoas used by Nokia resembles Android more than it does Windows Phone 7), Elop enjoyed familiarity with his past company where he had been a top executive. The pair announced integration of Microsoft services with Nokia's own services; specifically: Bingwould power search across Nokia devices integration of Nokia Maps with Bing Maps integration of Nokia'sOvi storewith theWindows Phone StoreThe partnership involves "funds changing hands for royalties, marketing and ad-revenue sharing", which Microsoft later announced as "measured in billions of dollars."Jo Harlow, whom Elop tapped to run Nokia's smartphone business, rearranged her team to match the structure led by Microsoft's VP of Windows Phone,Terry Myerson. Myerson was quoted as saying, "I can trust her with what she tells me. She uses that same direct and genuine communication to motivate her team." The first Nokia Windows phones, theLumia 800andLumia 710, were announced in October 2011 at Nokia World 2011 event. At theConsumer Electronics Showin 2012 Nokia announced theLumia 900, featuring a 4.3-inch AMOLED ClearBlack display, a 1.4GHz processor and 16GB of storage.The Lumia 900 was one of the first Windows Phones to support LTE and was released on AT&T on April 8. An international version will launch in Q2 2012, with a UK launch expected in May. TheLumia 610is the first Nokia Windows Phone to run the Tango Variant (Windows Phone 7.5 Refresh) and is aimed at emerging markets.On September 2, 2013, Microsoft announced adealto acquire Nokia's mobile phone division outright, retaining former CEO Stephen Elop as the head of Microsoft's devices operation. Microsoft managers revealed that the acquisition was made because Nokia was driving the development of the Windows Phone platform to better match their products.

FeaturesUser interfaceWindows Phone features auser interfacebased on Microsoft's Windows Phone design system, codenamedMetro, and was inspired by the user interface in theZune HD.The home screen, called the "Start screen", is made up of "Live Tiles", which have been the inspiration for theWindows 8live tiles. Tiles are links to applications, features, functions and individual items (such as contacts, web pages, applications or media items). Users can add, rearrange, or remove tiles. Tiles are dynamic and update in real time for example, the tile for an email account would display the number of unread messages or a tile could display a live update of the weather.SinceWindows Phone 8, live tiles can also be resized to either a small, medium, or large appearance.Several features of Windows Phone are organized into "hubs", which combine local and online content via Windows Phone's integration with popularsocial networkssuch asFacebook,Windows Live, andTwitter.For example, the Pictures hub shows photos captured with the device's camera and the user's Facebook photo albums, and the People hub shows contacts aggregated from multiple sources including Windows Live, Facebook, andGmail. From the hub, users can directly comment and 'like' on social network updates. The other built-in hubs are Xbox Music and Video, Xbox Live Games,Windows Phone Store, andMicrosoft Office. Windows Phone usesmulti-touchtechnology. The default Windows Phone user interface has a dark theme that prolongs battery life onOLED screensas fully black pixels do not emit light. Alternatively, users can also switch to a white background in their phone's settings menu.[41]The user may choose a light theme instead, and can also choose from several accent colors.[42]User interface elements such as tiles are shown in the user's chosen accent color.Third-party applicationscan be automatically themed with these colors. Text inputUsers input text by using an on-screenvirtual keyboard, which has a dedicated key for insertingemoticons,] and features spell checking and word prediction.App developers (both inhouse and ISV) may specify different versions of the virtual keyboard in order to limit users to certain character sets, such as numeric characters alone. Users may change a word after it has been typed by tapping the word, which will invoke a list of similar words. Pressing and holding certain keys will reveal similar characters. The keys are somewhat larger and spaced farther apart when in landscape mode. Phones may also be made with a hardware keyboard for text input.Windows Phone 8adds a new "Word Flow" keyboard, which includes features such as allowing the user to add accents to letters by pressing on an individual letter.MessagingWindows Phone utilizes a system which allow conversations to be held among users through multiple platforms (such asWindows Live Messenger,Facebookmessaging, orSMS) within a single thread.Web browserInternet Explorer on Windows Phone allows the user to maintain a list of favorite web pages and tiles linking to web pages on the Start screen. The browser supports up to 6 tabs, which can all load in parallel.[48]Other features include multi-touch gestures, a streamlined UI, smooth zoom in/out animations, the ability to save pictures that are on web pages, share web pages via email, and support for inline search which allows the user to search for a word or phrase in a web page by typing it.[49]ContactsContacts are organized via the "People hub", and can be manually entered into contacts or imported fromFacebook,Windows Live Contacts,Twitter,LinkedIn,Google, andOutlook. A "What's New" section shows a user's Facebook news feed and a "Pictures" section show pictures from those social networks, while a "Me" section within the "People" hub shows a user's own social network status and wall, allows the user to update his or her status, and allows them to check-in at museums or restaurants with Bing and Facebook. Contacts can also be added to the home screen by pinning them to the start. The contact's "Live Tile" displays their social network status and profile picture on the homescreen. Clicking on a contact's tile or accessing their card within the "People" hub will reveal their recent social network activity as well as the rest of their contact information.If a contact has information stored on multiple networks, users can link the two separate contact accounts, allowing the information to be viewed and accessed from a single card. As of Windows Phone 7.5, contacts can also be sorted into "Groups". Here, information from each of the contacts is combined into a single page which can be accessed directly from the Hub or pinned to the Start screen.EmailWindows Phone supportsOutlook.com,Exchange,Yahoo! MailandGmailnatively and supports many other services via thePOPandIMAPprotocols. Contacts and calendars may be synced from these services as well. Users can also search through their email by searching in the subject, body, senders, and receivers. Emails are shown with threads, and multiple email inboxes can be combined into a single view (a feature commonly referred to as "combined inbox") or can viewed separately.Multimedia

The Music + Video Hub on Windows Phone.Xbox Music + Videois a built-in application hub providing entertainment and synchronization capabilities between PC, Windows Phone, and other Microsoft products.[51]Before Microsoft's rebranding of its media products under the "Xbox" label, the hub was simply called "Music + Videos". This hub allows the user to access music, videos, and podcasts stored on the device, and links directly to the "Xbox Music Store" to buy music, or rent with theXbox Music Passsubscription service. When browsing the music by a particular artist, users are able to view artist biographies and photos, provided by the Xbox Music.[44]The Xbox Music hub also integrates with many other apps that provide video and music services, including, but not limited to,iHeartRadio, YouTube, andVevo. This hub also includes Smart DJ which compiles a playlist of songs stored on the phone similar to the song or artist selected.In late 2013, Microsoft released standaloneXbox MusicandXbox Videoapps to the Windows Phone Store, announcing their intention to separate the two entertainment hubs in future releases of Windows Phone. While the Xbox Music app is mostly unchanged, the Xbox Video app now gives the user the ability to stream and download videos directly from the Xbox Video Store, a feature previously unavailable in the "Xbox Music+Videos" built-in app. ThePictures hubdisplays the user's Facebook andSkyDrivephoto albums, as well as photos taken with the phone's built-in camera. Users can also upload photos to social networks, comment on photos uploaded by other people, and tag photos posted to social networks.[44]Multi-touch gestures permit zooming in and out of photos.Media supportWindows Phone supports WAV, MP3, WMA, AMR,AAC/MP4/M4A/M4Band3GP/3G2standards. The video file formats supported on WP include WMV, AVI, MP4/M4V,3GP/3G2andMOV (QuickTime)standards. These supported audio and video formats would be dependent on the codecs contained inside them. It has also been previously reported that theDivXandXvidcodecs within the AVI file format are also playable on WP devices.The image file formats that are supported includeJPG/JPEG, PNG, GIF, TIF and Bitmap (BMP). Users can also add custom ringtones which are less than 1MB in size and less than 40 seconds long.GamesThe "Games hub" provides access togameson a phone along withXbox Livefunctionality, including the ability for a user to interact with theiravatar, view and edit their profile, see their achievements and view leaderboards, and send messages to friends on Xbox Live. The Games hub also features an area for managing invitations and turn notifications in turn-based multiplayer games. Search

The Bing application on Windows PhoneMicrosoft's hardware requirements stipulate that every Windows Phone must have a dedicated Search button on the front of the device that performs different actions. Pressing the search button while an application is open allows users to search within applications that take advantage of this feature; for example, pressing Search in the People hub lets users search their contact list for specific people.[59]This has been changed in Windows Phone 7.5 however as the search button is reserved for Bing so applications that previously used this feature (such as the Marketplace) now include soft search buttons.In other cases, pressing the Search button will allow the user to perform a search of web sites, news, and map locations using theBingapplication. Windows Phone also has avoice recognitionfunction, powered byTellMe, which allows the user to perform a Bing search, call contacts or launch applications by speaking. This can be activated by pressing and holding the phone's Start button.Bing is the defaultsearch engineon Windows Phone handsets because its functions are deeply integrated in the OS (which also include the utilization of itsmap servicefor location-based searches and queries). However, Microsoft has stated that other search engine applications can be used.[60][61]In the area of location-based searches, Bing Maps (which is powered by Nokia's location services) providesturn-by-turn navigationservice to Windows Phone users, and Local Scout shows interest points such as attractions and restaurants in the nearby area. On Nokia devices, Nokia'sHere Mapsis preinstalled in place of Bing Maps.Furthermore, Bing Audio allows the user to match a song with its name, and Bing Vision allows the user to scan barcodes, QR codes, and other types of tags.Office suite

Microsoft Office Mobile on Windows Phone 8All Windows Phones come preinstalled with Microsoft Office Mobile, which provides interoperability between Windows Phone and the desktop version ofMicrosoft Office. Word Mobile, Excel Mobile, PowerPoint Mobile, and SharePoint Workspace Mobile apps are accessibile through a single "Office Hub," and allow most Microsoft Office file formats to be viewed and edited directly on a Windows Phone device. The "Office Hub" can access files from SkyDrive and Office 365, as well as files which are stored locally on the device's hard drive. Although they are not preinstalled in Windows Phone's "Office Hub," OneNote Mobile and Lync Mobile can be downloaded separately as standalone applicaitons from the Windows Phone Store.MultitaskingMultitasking in Windows Phone is invoked through long pressing the "back" arrow, which is present on all Windows Phones. Windows Phone 7 uses a card-based task switcher, whereas Windows Phone 8 utilizes true background multitasking.SyncWindows Phone 7Zune Software manages the contents on Windows Phone 7 devices and Windows Phone can wirelessly sync with Zune Software.Windows Phone 8Syncing content between Windows Phone 8 and Windows is provided through theWindows Phone App, which is available for bothWindowsandMac OS X. It is the official successor to Zune software only for Windows Phone 8, and allows users to transfer content such as music, videos, and documents.Users also have the ability to use a "Tap and Send" feature that allows for file transfer between Windows phones, and NFC-compatible devices throughNFC.Updates

A test notification of an "update available" pop-up in the Windows Phone emulator.According to Microsoft documentation, software updates will be delivered to Windows Phone users via Microsoft Update, as is the case with other Windows operating systems. Microsoft had the intention to directly update any phone running Windows Phone instead of relying onOEMsorwireless carriers,but on January 6, 2012, Microsoft changed their policy to let carriers decide if an update will be delivered. The software component, called Windows Phone Update, exists both on the phone (for smaller updates, over-the-air) and in the Zune Software for Windows PCs (for larger updates, viaUSBconnection). Users will be notified to attach their phones to a PC if such an update is required. Starting with Windows Phone 8, all updates, both large and small support over-the-air downloads. Charlie Kindel, Program Manager for the developer experience of Windows Phone, confirmed that the update infrastructure system for Windows Phone was available and that Microsoft is "in a position where we have the systems in place to effectively and reliably deliver updates to (Windows Phone) users".[67]Since Windows Phone 8, Microsoft has also begun releasing minor updates that add features to a current OS release throughout the year.[68]These updates were first labeled "General Distribution releases" (or GDRs), but were later rebranded simply as "Updates".All third-party applications can be updated automatically from theWindows Phone Store. Advertising platformMicrosoft has also launched an advertising platform for the Windows Phone platform. Microsoft's General Manager for Strategy and Business Development, Kostas Mallios, said that Windows Phone will be an "ad-serving machine", pushing advertising and brand-related content to the user. The platform will feature advertising tiles near applications andtoast notifications, which will bring updating advertising notifications. Mallios said that Windows Phone will be able to "preserve the brand experience by going directly from the web site right to the application", and that Windows Phone "enables advertisers to connect with consumers over time".Mallios continued: "you're now able to push information as an advertiser, and stay in touch with your customer. It's a dynamic relationship that is created and provides for an ongoing dialog with the consumer."[71]BluetoothWindows Phone supports the followingBluetooth profiles: 1. Advanced Audio Distribution Profile (A2DP 1.2)2. Audio/Video Remote Control Profile (AVRCP 1.3)3. Hands Free Profile (HFP 1.5)4. Headset Profile (HSP 1.1)5. Phone Book Access Profile (PBAP 1.1)6. Bluetooth File Transfer (OBEX) (from Windows Phone 7.8)Windows Phone BTF support is available from Windows Phone 7.8, but is limited to the transferring of pictures, music and videos via a 'Bluetooth Share' app.

Store

Windows Phone Store onWindows Phone 8TheWindows Phone Storeis used to digitally distribute music, video content,podcasts, and third party applications to Windows Phone handsets. The store is accessible using theZune Softwareclient or the Windows Phone Store hub on devices (though videos are not downloadable through the store hub and must be downloaded and synced through the Zune software).[75]The Store is managed byMicrosoft, which includes an approval process. As of March 2012, the Windows Phone Store is available in 54 countries. Music and videosXbox Music offers 30 million songs up to 320kbit/s inDRM-free MP3 format from thebig four music groups(EMI,Warner Music Group,Sony BMGandUniversal Music Group), as well as smaller music labels. Xbox Video offers HD movies fromParamount,Universal,Warner Brothers, and other studios and also offer television shows from popular television networks.Microsoft also offers theXbox Music Passmusic subscription service, which allows subscribers to download an unlimited number of songs for as long as their subscription is active and play them in current Microsoft devices.Applications and gamesDevelopmentThird party applications and games for Windows Phone are based onXNAor a WP7 specific version ofSilverlight.[77]For Windows Phone apps to be designed and tested within Visual Studio 2010 or Visual Studio 2010 Express editions, Microsoft offers Windows Phone Developer Tools as an extension. Windows Phone Developer Tools run only on Windows Vista SP2 and later.[78]Microsoft also offersExpression Blendfor Windows Phone for free. On November 29, 2009, Microsoft announced theRelease to web (RTW)version of itsVisual Basic .NETDeveloper Tool, to allow development in Visual Basic.As it shares much of its platform, Windows Phone 8 will support the running ofmanaged codethrough aCommon Language Runtimesimilar to that of theWindows operating systemitself as opposed to the.NET Compact Framework. This, along with support for native C and C++ libraries, will allow some Windows programs to be easily ported to Windows Phone 8. SubmissionRegistered Windows Phone and Xbox Live developers can submit and manage their third party applications for the platforms through the App Hub web applications. The App Hub provides development tools and support for third-party application developers. The submitted applications undergo an approval process for verifications and validations to check if they qualify the applications standardization criteria set by Microsoft.The cost of the applications that are approved is up to the developer, but Microsoft will take 20% of the revenue (the other 80% goes to the developer).[81]Microsoft will only pay developers once they reach a set sales figure, and will withhold 30% tax from non-US developers, unless they first register with the United States Government's Internal Revenue Service. Microsoft only pays developers from a list of thirty countries. A yearly fee is also payable for developers wishing to submit apps. In order to get an application to appear in theWindows Phone Store, the application must be submitted toMicrosoftfor approval.[82]Microsoft has outlined the content that it will not allow in the applications, which includes content that, among other things, advocates discrimination or hate, promotes usage of drugs, alcohol or tobacco, or includes sexually suggestive material

HardwareWindows Phone 7 devices were first produced by Dell, HTC, LG and Samsung. These hardware partners were later joined by Acer, Alcatel, Fujitsu, Toshiba, Nokia, and ZTE.Windows Phone 8 devices are currently being produced by HTC, Huawei, Nokia, and Samsung. LG, Micromax and Sony (under Xperia or Vaio brand) have also stated their intention to produce Windows Phone 8 devices in the near future.

ReceptionThe main criticism of Windows Phone is still the lack of applications when compared to iOS and Android. Modern UIThe reception to the Modern UI and overall interface of the OS has also been highly praised for its style[citation needed], with ZDNet noting its originality and fresh clean look.Engadget and ZDNet applauded the integration of Facebook into the People Hub as well as other built-in capabilities, such as Windows Live, etc. Since middle 2010, Metro UI has been renamed to Modern UI.

Windows Phone 7 update historyWe think even great software can always get better. That's why we periodically release Windows Phone software updates to add new features you've asked for and to maximise your phone's performance.Below is a summary of what we've included in each update so far. The update number refers to the Windows Phone operating system (OS) version. The updates are listed in reverse chronological order (the most recent is listed first).Because updates are cumulative, when you install the latest update, you'll also get all the previous updates if your phone doesn't have them already. Only updates that apply to your phone will be downloaded and installed.When it's available, we'll also pass along software from phone manufacturers that improves the performance of specific phone models. If you have questions about what's included in a phone manufacturer update, contact yourphone manufacturer.To learn how to install updates, see if there's an update available for you to download and determine which version of Windows Phone you have now, seePhone updates FAQ. For information about improvements to Windows Phone 8, seeWindows Phone 8 update history.Update 7.10.8862.144Also known as Windows Phone 7.8*.Start.Provides resizable small, medium and large Live Tiles so you can customise yourStartexperience in new ways.Accent colours.Expands the number of availableaccent coloursto 20.Lock screen.Improves thelock screenexperience with accidental wipe protection features and the Bing image of the day wallpaper.Marketplace and Xbox.Expands Windows Phone Marketplace and Xbox support to new countries and regions.Fonts.Enhances the Chinese font and improves the appearance of Arabic and other languages.Live Tiles.Fixes performance issues from a previous update.Other improvements.Includes many other improvements to Windows Phone.This update is not available in all markets or for all phones. To learn more about what's included in this update, seeWindows Phone 7.8.*Windows Phone 7.8 is the officialproduct namewe use to describe this release. However, due to a quirk of software development, the actualOS versionis identified as 7.10.8862.144. You'll see both of these names on your phone inSettings>About>More information.Update 7.10.8773.98Messaging.Adds new messaging capabilities to your phone. You can now attach multiple pictures, videos, audio notes and ringtones to text messages.Other quality improvements.Includes many other improvements to Windows Phone.This update is not available in all markets or for all phones.Update 7.10.8107.79On-screen keyboard.Fixes an issue to prevent the keyboard from disappearing during typing.Email.Fixes a Gmail synchronisation issue.Location.Fixes a location access issue. With this fix, the Me feature in the People Hub only sends anonymous information about nearby WiFi access points and mobile phone masts to Microsoft if you agree to allow the Check In function to access and use location information.Security.Revokes digital certificates from DigiCert Sdn Bhd to address an encryption issue.Email threads.Fixes an email issue related to Microsoft Exchange Server 2003. With this fix, when you reply to or forward a message, the original message is now included in your response.Voicemail.Fixes a voicemail notification display issue that occurs on some European and Asian networks under certain conditions.Update 7.10.7740.16Email threads.Fixes an email issue related to Microsoft Exchange Server 2003. With this fix, when you reply to or forward a message, the original message is now included in your response.Voicemail.Fixes a voicemail notification display issue that occurs on some European and Asian networks under certain conditions.This update is available only in certain markets.Update 7.10.7720.68Also known as Windows Phone 7.5*.Hundreds of new and improved features.Based on your feedback, we've scoured Windows Phone from top to bottom looking for ways to make it easier for you to connect and share with friends, discover and use smarter applications, and tap into the power of the web.*Windows Phone 7.5 is the officialproduct namewe use to describe this release. However, due to a quirk of software development, the actualOS versionis identified as 7.10.7720. You'll see both of these names on your phone inSettings>About>More information.Update 7.0.7392.0Fix for fraudulent third-party digital certificates.This update includes a critical fix to an industry-wide issue with nine untrusted digital certificates that were issued by one root certificate authority. These third-party digital certificates are used to access popular websites and email portals.Although this is not a Microsoft security vulnerability, these untrusted certificates may be used to spoof content, perform phishing attacks or perform man-in-the-middle attacks against all web browser users. This update moves the affected certificates to the "Untrusted Publishers" certificate store on Windows Phone, which helps ensure that these fraudulent certificates are not inadvertently used. For more info, seeMicrosoft Security Advisory (2524375).Update 7.0.7390.0*Also known as the "NoDo" update. Copying & pasting.Press a word and drag the arrows to copy and paste text on your phone. You can copy text from emails, text messages, web pages and Office Mobile documents, and paste it anywhere you can type. To learn more, seeCopying and pasting. Faster applications and games.Nobody likes to wait. That's why we've whittled down the time it takes for applications and games to start up and resume. It's all part of our focus on getting you to the things you love, easier and faster. Better Marketplace search.We've streamlined Marketplace search to make it easier to find specific applications, games or music. Press the Search button in the Applications or Games section of Marketplace and you'll only see applications or games in the results. Press Search in the Music section of Marketplace to search just the music catalogue. Other Marketplace improvements.We've improved the stability of Marketplace while you download applications. We've also improved the experience of downloading applications that are larger than 20 megabytes, upgrading from trial applications to paid applications, sharing links to applications via email, sorting Xbox LIVE games by release date and creating an Xbox LIVE account from within the Games Hub. WiFi improvements.We now display your phone's Media Access Control (MAC) address in Settings. (You might need this info if you try to connect to a WiFi network that uses MAC address filtering. To learn more, seeConnecting to a WiFi network.) We've also removed the limit on the number of WiFi profiles that you can store and reduced the time it takes to start your phone if you've stored lots of WiFi profiles. Outlook improvements.We've improved the experience of viewing iPhone photo attachments you receive from a non-Exchange-based email account (such as a Gmail, Hotmail or Yahoo! Mail account), using the Global Address List (GAL) when connecting to Exchange Server 2003 using Exchange ActiveSync, and working with email display names that contain brackets (for example, "David Alexander [Contoso]"). Facebook integration.We've improved the experience of synchronising Facebook accounts. Camera improvements.We've improved the stability of switching between camera and video modes. Audio improvements.We've improved the experience of using a Bluetooth headset to make calls when you're playing music or videos. Other performance improvements.This update also includes software from several phone manufacturers that improves the performance of specific models. Naturally, if you don't have one of the affected models, we won't install this portion of the update on your phone.*New phones with OS version 7.0.7389.0 include all of the features and improvements that are included in OS version 7.0.7390.0.Update 7.0.7008.0Update process improvements.This behind-the-scenes update improves the update process itself.

Windows Phone 8 (codename Apollo) is the next generation of Windows Phone, as officially confirmed by MS at an MSDN seminar in August 2011 and previewed at Microsoft's 'sneak peek' at Windows Phone on June 20, 2012. Devices will be launched by four companies,Nokia,Huawei,SamsungandHTCand others includeAcerLenovoandZTE. All devices will be based onSystem on ChipsfromQualcomm(Snapdragon S4 Plus). Current Windows Phone 7.x devices will not be able to run or update to Windows Phone 8 and new applications compiled specifically for Windows Phone 8 will not be made available for Windows Phone 7.x devices.[29]TheGDR3/Update 3update is possible to install on any Windows Phone with GDR2 by registering for a free Microsoft App Studio ID,[30]installing the certificate sent by email (not necessary) and lastly installing the Preview for Developers app[31]before checking for updates in the settings menu on Windows Phone. However, this may void the OEM and carrier warranty of the device.

8.0.9903.10ApolloOctober 29, 2012 Transitions to core components from Windows 8, including kernel, file system, drivers, network stack, security components, media and graphics support Support formulti-coreCPUs of up to 64cores (system is currently optimized for Snapdragon S4 dual and quad core processors) Support for WXGA (1280720, 1280768) resolutions Support for MicroSD cards Internet Explorer 10 Background multitasking (enhanced) NFCsupport added, including payment and content sharing with WP8 and Windows 8 machines (NFC is partially supported in Tango update, e.g. ZTE Orbit) Native code support (C and C++), simplified porting from platforms such as Android, Symbian, and iOS (Native code is also supported in WP7 for vendors, carriers and key partners) Simplified porting of Windows 8 apps to Windows Phone 8 (compatibility with Windows 8 'Modern UI' apps) Carrier control and branding of "wallet" element is possible via SIM or phone hardware (Orangewill be first) Nokia map technology (Navteqmaps with offline mode, turn-by-turn directions) Native 128-bit Bitlocker encryption, Secure Boot Remote device management of Windows Phone similar to management of Windows PCs VoIP and video chat integration for any VoIP or video chat app (integrates into the phone dialer, people hub) In-app purchases Firmware over the airfor Windows Phone updates Minimum 18 month support of Windows Phone updates to WP8 devices Camera app now supports "lenses", which allow third parties to skin and add features to camera interface Camera burst mode that let users choose the best picture from a series of pictures Camera panoramic setting using Microsoft's PhotoSynth technology Possibility to take screenshots DeeperSkyDriveintegration, including ability to sync data such as music collections Data Sense tracks and reports data usage, lowers data usage when nearing pre-set data cap, enables compression of websites through cloud service, locates WiFi hotspots ScrappedZunedesktop software for syncing Kids corner Rooms Live Apps

8.0.10211.204

(GDR1)December 11, 2012 Messaging improvements - multiple recipients when sending messages, automatically saving unsent drafts, possibility to edit forwarded messages[32] Text replies to incoming calls Internet Explorer improvements - prevent pictures from downloading automatically, possibility to delete selected sites from browsing history Wi-Fi connectivity - option of keeping WiFi alive while screen is off, Wi-Fi network prioritization Other unnamed improvements8.0.10327.77Or

8.0.10328.78

(GDR2)July 12, 2013 Google accounts. Windows Phone 8 now supports the CardDAV and CalDAV protocols that allow people to sync Google contacts and calendar information when they get new phones. Xbox Music. Easier to select, download, and pin music. More accurate metadata and other performance improvements. FM radio. Possible to listen to FM radio from the Music+Videos hub. (Not available for all phones.) Data Sense. Possible to set a limit based on the data plan (already included since initial release forVerizonsubscribers) Skype. Voice over Internet Protocol (VoIP) apps like Lync and Skype features improved stability and performance. Internet Explorer. Better browsing experience with improved HTML 5 compatibility. Camera. Set favorite Lens so it opens automatically when pressing the camera button. (Not available for all phones.) Other improvements. Includes many other improvements to Windows Phone.

8.0.10512.142]Or

8.0.10501.1278.0.10517.1508.0.10521.155

(GDR3/Update 3) October 14 2013 Support for large displays and start screen with six tiles across instead of four (only for supported devices) 1080pscreen resolution support Support forQualcommSnapdragon 800 SoC (Quad-coreCPU) New Driving Mode feature to ignore texts, calls and quick status alerts, plus auto-reply via SMS to people trying to contact you Accessibility improvements for visually impaired Improved Internet Sharing (pair over bluetooth with Windows 8.1 devices and ICS is set up automatically) Ability to leverage custom notification sounds, including instant messages, emails, voicemails, reminders and custom ringtones to contacts for text messages Screen Rotation lock Better storage management Ability to close applications in app switcher Wi-Fi access during phone set up Bluetooth bug fixes and improvements to connection quality for Bluetooth accessories "Hundreds of under-the-hood performance tweaks and enhancements"

Comprehensive security and encryption Secure boot.Windows Phone 8 secure boot allows only verified software components to execute, which supports platform integrity and helps protect against malware. Code signing.Windows Phone 8 operating system services and applications are signed with a Microsoft certificate. This approach helps protect against malware and ensures that only trusted code can run. App sandboxing.Windows Phone 8 app sandboxing prevents malicious apps from gaining unauthorised access to data and delivers a trustworthy platform for business apps. Information rights management.Windows Phone 8 comes with full rights management support to help protect your organisation's intellectual property and is a cost-effective way of helping to prevent data leaks. BitLocker device encryption.To help keep everything from documents to passwords safe, Windows Phone 8 encrypts the operating system and data files. With device encryption turned on, any file saved to the phone is encrypted automatically.