Windows Phone 8.1 is now on 11.9% of Windows Phone handsets, up from last month's 7.7%

Speaking of Windows Phone 8.1, it currently is powering 11.9% of Windows Phone handsets. That is up from the 7.7% share that Windows Phone 8.1 carried last month. The update has started, and as we mentioned, there are those three devices that come with the new build of the OS out of the box. Windows Phone 8 is still on 70.4% of Windows Phone units with Windows Phone 7.x on the remaining 17.7%. Believe it or not, Windows Phone 7.x actually increased .7 percentage points this month. This could be due to some strange fluke with the stats that showed an increase in market share for the Nokia Lumia 710 during the same time period.
AT&T's recent closing of its purchase of pre-paid carrier Cricket enabled the latter to hit the U.S. carrier chart with a 7.3% share of Windows Phone handsets in use. AT&T is the top stateside carrier, responsible for connecting 34.2% of active Windows Phone handsets. T-Mobile is next with 21.8%, followed by 14.1% for Verizon.
source: AdDuplex via TechCrunch