Windows Phone 8.1, codenamed ‘Blue’, is the latest update to the Microsoft Windows Phone operating system. It was announced at Microsoft’s Build 2014 conference in April, with new devices arriving later that month.
A 'developer preview' program, akin to Update 3, was also announced at Build, with availability for the general public coming April 10th.
All current Windows Phone 8 devices, including the Lumia 520, qualify to receive the update.
History and Future
Following the re-launch of Windows Phone 8 back in late 2012, the 8.1 update follows on Microsoft’s planned 18-month upgrade path for their mobile operating system. While Windows Phone 8 had three feature-adding updates during its life-cycle (‘Portico’, Update 2, Update 3), the 8.1 update is a significant overhaul of the OS.
After Windows Phone 8.1 is announced (May 2014), it is expected to receive numerous General Distribution Release (GDR) updates, finally being supplanted by a spring 2015 release of ‘Threshold’ aka Windows Phone 8.2 or Windows Phone 9. The first update for Windows Phone 8.1 should wrap development in June, with a release later that summer.
On February 11, 2014, the beta SDK for Windows Phone 8.1 leaked. You can follow all of that coverage here: wpcentral.com/windows-phone-81-sdk
Our list of all the changes in the Windows Phone 8.1 can be found here: www.wpcentral.com/windows-phone-81-features
Our complete review of Windows Phone 8.1 can be found here: http://www.wpcentral.com/windows-phone-81-review