Windows Phone 7.5

Here is the list of features included in Mango. Each feature contains a link to the most recent information on it. We tried to make the list as comprehensive as possible, but there’s always a possibility that we left something out. If you notice something missing, feel free to leave a comment below.

New

SkyDrive support (including shared folders)
Internet Explorer 9
HTML5
Hardware acceleration
Multitasking
Task-switcher
Twitter integration
Xbox LIVE Avatar accessories
Kinect integration
Skype
Application jump list
Application search
Redesigned Marketplace
Improved Marketplace search results
Streamlined app installation
Over-the-air podcasts
Silverlight + XNA
Improved panorama and pivot controls
TCP/IP sockets
SQL CE database
Live Agents
Deep Links
Multiple live tiles per app
Gyro
Motion Sensor
Instant-resume for apps
Power management (Battery Saver)
Parental controls (including M-rated titles)
Custom ringtones
Background audio
File download service
Alarm notifications
Redesigned Games Hub
Silverlight 4
Beta/private publishing on the Marketplace
Pinnable email folders
Email conversation view
Server search
Lync
Complex (alpha-numeric) passwords
Information Rights Management
Hidden WiFi networks
App Connect (formerly Search Extras)
Quick Cards
Local Scout
Indoor maps
Photo translation
Image search
Improved virtual keyboard
Contact communication history
LinkedIn integration
Notifications
Calendar integration with Facebook Events
Facial recognition
People tags
Updated mobile versions of Word, Excel, PowerPoint, and OneNote
Single track repeat
Improved drop-down media controls
Playback controls on the lock screen
Favorite places
Web Marketplace
Multiple file formats on SkyDrive, including PDF
Instant access to Bing under device lock
Emoticons
Photo auto-fix
Improved Marketplace search
Artist imagery on artist card
Related artists
Detailed now playing list
Toggle for full-screen video
Video scrubing
Game history
Achievement comparison
Xbox LIVE friends list
Xbox LIVE messages
Command bar integrated in all hubs, includes search button
Save camera settings
Vibrate-only alarm and new alarm sounds
Snooze options for reminders
Redesigned Pictures Hub
Redesigned Camera
Microsoft Points balance shown in the Games Hub
“Open IE9 tab in new/current tab” setting
Bing Maps auto-navigates to user’s location
Microsoft Office for Mobile updated to v14.5
Camera Roll moved to the main area of the Pictures Hub
Option to enable tap screen to take pictures
Password lock time interval
Zune HD-like shutdown experience
Animated Pictures Hub tile
Recent games list
Improved Avatar animations (changes based on message context)
Improved call screen
Quick Events
Sync Twitter followers to the People Hub
Pictures Hub live tile slideshow
Talking caller ID
Fast Async
Avatar Awardables
Game add-ons
Photo apps included in the Pictures Hub
Pin photo albums to start
Review photos under lock

Confirmed

Location check-ins
Photosynth (possibly as an app)
Windows Live Messenger / Facebook Chat
Bing Vision
Bing Audio
Auditory turn-by-turn navigation
SMS dictation
Threads
Colored tiles for Office documents
Support for additional languages
Visual voicemail
Office 365 support
Groups
Artist imagery on lock screen
Redesigned Music + Videos Hub
Smart DJ
Playlist management
Enable/disable camera sound
Linked Inbox
Multiple calendars for Windows Live and Exchange accounts
Facebook video uploads (SkyDrive too)
Facebook notifications
Task (To-Do) support (Windows Live and Exchange)
Downloadable content
Front-facing camera
Music and video streaming from SkyDrive
Internet sharing (tethering)
NFC Support
Support for Wi-Fi Hotspots

Rumored

Mobile Studio
AOL Instant Messenger (AIM)
Multiple calendars for non-Windows Live accounts
Real-time multiplayer
AppChecker
Lunar dates for the calendar
Expanded flag support for emails
Windows Live Messenger nudge
Windows Live Messenger group chat
Share Xbox LIVE profile on Facebook
Xbox LIVE Party and Voice Chat
Advanced options for LAN connection
Multiple keyboard layouts (QWERTY, QWERTZ, AZERTY)
Resizable touch targets for virtual keys
Send customized dictionaries to Microsoft

Debunked

Xbox LIVE multiplayer toggle
Games Marketplace moved out of Zune
In-app transactions

Interestingly, only eighteen confirmed features started off as rumors. Many others were mentioned in passing at MIX 11 and World Mobile Congress before being forgotten and eventually turned into a rumor. This was, for example, the case with on-device podcast support. In the New category, 1-9 were announced at World Mobile Congress, 10-35 were revealed at MIX 11, 36-42 were discussed at Tech·Ed, and 43-63 were unveiled at this week’s Mango event.

So where does this leave us? At this point, Microsoft has discussed 132 features included in Mango. Rumors still surround an additional 15 features, and at least three were proven false. It’s quite a list, but even with the rumored features added in, it’s nowhere near Ballmer’s figure of 500. Obviously, the discrepancy could be explained by two likely scenarios: Microsoft’s method of counting might be different than ours, and there are sure to be many more as-yet-unannounced features still waiting in the wings.

We’ll be updating this list as more features are revealed, confirmed, rumored, and debunked. It will be interesting to see if the list swells to 500 by the time Mango comes out this fall