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 has the intention to directly update any phone running Windows Phone instead of relying on OEMs or wireless carriers. 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, via USB connection). Users will be notified to attach their phones to a PC if such an update is required. Microsoft has said that in the future, all updates, both large and small will eventually 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".
Microsoft plans to regularly ship minor updates that add features throughout the year, and major updates once a year.7.0.7008 - Improvement for future update
7.0.7390 - Codename "NoDo" with Copy and Paste, fast application startup, and deeper Facebook Integration
7.0.7392 - Revoking of fraudulent certificates
7.0.7403 - Pre-Mango
7.10.7720 - Windows Phone 7.5 Mango available now
7.10.7740 - Fixed email issue in Microsoft Exchange Server 2003 and voicemail notification issue.
All third-party applications can be updated automatically from the Windows Phone Marketplace.
