It seems like, Windows Phone 8.1 is coming with lots of great feature. Rumors are saying that it will have a notification center (action center), Cortana and Start Screen Background. Well, here is a sneak peak of Start Screen Background on Windows Phone 8.1.
Microsoft has announced that there will be dual-SIM feature on Windows Phone. Reports are also saying that there will be an update to Bing voice Search Service, which is Cortana. Although it is not yet confirmed, that Microsoft will release it some time soon!
However, Microsoft has partnered with some other manufactures to bring more Windows Phones. They are rumoured to release Windows Phone 8.1 at Build 2014 Developers Conference this year.
Here is some more pictures: