for all wanting to know ,follow this link, it has been released today
Mobile Community - New software update for Lumia 830 rolling out in s... - Microsoft Mobile Community
Features offered in the update
Latest software release for Lumia 830 is Lumia Denim (02040.00019.14484.24xxx/8.10.14219.341)
•Cortana, the most personal digital assistant, is now available in more markets.
•The new Lumia Camera is faster and simpler than ever, while offering stunning new features. Take multiple photos with milliseconds between shots. Take the best-quality smartphone photos in daylight and low light. Snap away without worrying about the settings, then select and edit the perfect shot later with the Rich Capture feature.
•With Lumia Moments, you can extract great action shots from your videos or Full HD (1080p) moment photos. Use Best Frame to find your favourites and save them as Living Images, then see them brought to life in the camera roll or the Lumia Storyteller app. Use the Action Shot and Motion Focus options to create unique photos.
•You can easily switch your mobile data connection on or off in the action centre.
•Install phone updates more easily by scheduling them for a time that works best for you.
•Additional improvements to stability, performance, audio quality, WiFi connectivity, and more