Microsoft confirms third Live Tile column for 1080p handsets only
Three column Live Tile screens are limited to Windows Phone 8 models sporting an FHD display
On Monday, we told you that any ordinary Joe or Judy could update their Windows Phone 8 handset using the backdoor (albeit losing the warranty in the process) which means that many of you were hoping to see an updated Start screen with a third column of Live Tiles after installing the update. If you were one of those looking forwarded to an updated Start screen, by now you must realize that it is not part of GDR3 for currently available phones running the platform.
As it turns out, the third column of Live Tiles will be available only on those Windows Phone 8 handsets sporting a screen with FHD resolution. That means even the top-shelf Nokia Lumia 1020 will have to keep the current two column Live Tile layout. We do expect to see the three column Live Tile screen make its debut with the 6 inch Nokia Lumia 1520 phablet, which is expected to be unveiled October 22nd in Abu Dhabi.
source: @joebelfiore via PhoneNews.co, GSMArena