I wanna ask that is samsung ativ S upgradable to wp8 amber?

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. (Existing phones that are synced to a Google account prior to December 31, 2013 will continue to sync as before.)

Xbox Music. It's now easier to select, download, and pin music. Plus, music fans will see more accurate metadata (such as song and album information) and many other performance improvements.

FM radio. Listen to FM radio right from the Music+Videos hub. (Not available for all phones.)

Data Sense. Stay on top of your phone's data usage with Data Sense. You can set a limit based on your data plan, or just keep track of which apps use the most data. (Not all mobile operators offer Data Sense.)

Skype. Voice over Internet Protocol (VoIP) apps like Lync and Skype now feature improved stability and performance.

Internet Explorer. Several fixes, including improvements to media playback reliability, will make your web browsing experience better than ever.

Camera. Set your favorite Lens so it opens automatically when you press the camera button. (Not available for all phones.)

Other improvements. Includes many other improvements to Windows Phone.

But my glance screen stay all night long if i charge it overnight     

any1 have a list of GDR3 updates on? or videos about it?

INCOMING 6 NEW DEVICES!

http://www.theverge.com/2013/9/25/4769190/...-22-event-plans

Kinda disappointed that Nokia promised Amber for all model by late September but now also still never get yet. This was two months ago btw... :/

You can sign in and it will associate all your contacts and calender into the phone
No need apps.

I no use the IE so maybe you can try seek answer from others.

what alternatives available to replace IE?

That's good because I will use gmail a lot. You don't use IE so what browser are you using? Others apps such as whatsapp, fb, twitter all are stable or still got some bugs?

Which of the updates are not in Lumia 520?

Universal binaries. Microsoft is currently pushing the notion of universal binaries that would let developers create a single app that can run both on Windows RT and Windows Phone. This is opt-in because of size issues, apparently, but could eventually become a requirement. Where Windows Phone 8 has 33 percent "API unity" with Windows RT, Windows Phone 8.1 will hit 77 percent.

Multitasking. Microsoft has supposedly flagged multitasking as Windows Phone's biggest technical issue. GDR3 will fix some issues—it will let users manually close apps, for example—but notifications and background processes are a mess and quite inefficient. These issues will apparently be addressed by 8.1.

Bigger screens. Where GDR3 is widely expected to support 5- to 6-inch screens, 8.1 will supposedly support 7- to 10-inch screens as well. This obviously infringes on Windows RT/8.x tablets, so it's not clear what the thinking is there.

No more Back button. Aping the iPhone navigation model, Microsoft will apparently remove the Back button from the Windows Phone hardware specification with 8.1. The Back button just doesn't make sense, I was told: Users navigate away from an app by pressing the Start button and then open a new app, just like they do on iPhone. And the "back stack" is ill-understood by users: Most don't realize what they're doing when they repeatedly hit the Back button.

Low-cost/volume vs. High-cost/luxury. With the Lumia 520 and 620, Windows Phone has found its niche in the low end of the market. This has helped sales, but Microsoft has always wanted to position Windows Phone as a high-end system like iPhone, which is where the money is. Obviously, they're not going to walk away from market share gains, but low-end phones have technical limitations that harm the platform's forward progress. And this is what sank Windows PC sales when the netbook arrived. The push to 1080p screens and bigger devices will determine whether Windows Phone can break out of this mold.