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 most recent update is listed first.
Updates to Windows Phone 8 are cumulative—so 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 your phone manufacturer.
See How do I update my phone software? to learn how to install updates or check if there's an update available for you to download.
Messaging improvements. A great messaging experience is now even better. You can now add multiple recipients at the same time when you send a text message and automatically save unsent text messages as drafts. You can even edit received text messages before you forward them.
Text replies to incoming calls. Can't take a call? Now you can send a prewritten text reply to a caller directly from the call answer screen. It's a nice way to let people know that you're not ignoring them.
Internet Explorer improvements. You can now change your settings to prevent pictures from downloading automatically—an easy way to help keep data usage low. You can also delete selected sites from your browsing history and leave the rest intact.
Wi-Fi connectivity. Got a favorite Wi-Fi network? Windows Phone 8 will now prioritize Wi-Fi connections based on your connection history.
Other improvements. Includes many other improvements to Windows Phone.
This update will be made available at different times, depending on your country or region, mobile operator, and phone model.
via Windows Phone