Microsoft might enter the phablet game with an extra row of live tiles for 5"+ Windows Phones

One of my contacts confirmed that... the so-called "GDR3" (General Distribution Release 3) Windows Phone 8 update is where Microsoft will make this change. My contact said GDR3 will add support for five- to six-inch devices with 1080p support. Along with the higher resolution, GDR3 also could include changes in the start screen and core Windows Phone 8 apps, such as possibly adding a third column of apps in the start screen, my source added.

GDR3 is expected to be the last Windows Phone 8 OS update Microsoft releases before it introduces Windows Phone Blue. Windows Phone Blue is expected to arrive a number of months after Windows Blue, a k a Windows 8.1, possibly as late as early 2014.