Available to those registered as Windows Phone developers, or out of the box to buyers of the Nokia Lumia 630 and Nokia Lumia 635, Windows Phone 8.1 is now running on 7.7% of Windows Phone models. That is up from the 5.2% of Windows Phone users running the latest Windows Phone build last month. Windows Phone 7.x is still powering 17% of the Windows Phone market.
The data also shows that the most popular Windows Phone model, the entry-level Nokia Lumia 520, might have hit a peak. Last month, the phone owned 33.7% of the global Windows Phone market. That figure is down to 31.6%, which is still impressive nonetheless. The Nokia Lumia 625 and Nokia Lumia 930 remain numbers two and three with market shares of 7.3% and 6.9% respectively. Red hot is the Nokia Lumia 630, moving up 10 places during the last month, to now occupy the 20th spot among Windows Phone's heavy hitters.
In the U.S., the Nokia Lumia 520 owns 33.8% of the market. The T-Mobile branded twin, the Nokia Lumia 521, has 17.9%, while the Nokia Lumia 920 owns 8%. China is one of the rare countries where Windows Phone is not led by the Lumia 520. Instead, the Nokia Lumia 920 leads the way with 19.5% of the Chinese market, followed by the 9.8% owned by the Nokia Lumia 520. The Nokia Lumia 925 is third with 9.6%.