It is time for the new installment of our Windows Phone statistics report. Let’s see what’s changed over the month. And there are some really noticeable changes.

Data source

This report is based on data collected from 494 Windows Phone apps running AdDuplex SDK v.2. The raw data analyzed was collected over the day of April 4th, 2013 (UTC time). We have made every attempt to consolidate different reported phone model names under their canonical retail model names, but it is possible that some of the rare model name variations were not accounted for.

Worldwide stats

The most dramatic change is that Nokia Lumia 920 is now the most used Windows Phone device in the world. It beat previous leader (Lumia 800) by a very small margin, but it is still a huge achievement since it was only at number 4 a month ago.

To get a better view on how this happened over time let’s take a look at new app installations on Lumia 920 as percentage of all new Windows Phone app installations.

As you can see the 920 had a few bumps probably related to supply problems, but overall is steadily growing its share. It looked like it stabilized at 11-12% mark a couple of months ago, but started growing again over the last couple of weeks, which led to it stealing the crown from Lumia 800.

The reasons could be resolved supply problems and/or wider availability. We’ve also heard that Lumia 800 “leftovers” were heavily pushed in many markets, but they are now mostly gone. Still it is fascinating to see that the most expensive Windows Phone is also the most popular. We’ll see how this changes once lower end Nokia’s become widely available.

Lumia 620 has already jumped from 2% share to 7% and we already see 520 and 720 popping up not that far away from the top 10.

As for manufacturers, Nokia continues the land grab and has reached an unhealthy (for everyone, but Nokia) 80% mark.

Let’s take a look on the Nokia’s share by countries. The following charts includes countries where we’ve seen at least a 100 different devices only.

The first one represents countries were Nokia has the largest share and the second one – countries with lowest Nokia’s share. As you can see, even in the “bottom” list, there are only two countries where Nokia is below 50%.

Windows Phone 8 is accelerating its growth (or should we say Windows Phone 7 decline?).

Last month WP8 has grown 5% (from 26% to 31%), but this month the growth has more than doubled. WP8 share increased by 12% (from 31% to 43%).

Let’s look how Windows Phone 8 is doing in Windows Phone 7 launch countries.

The most notable thing here is that France is leading in Windows Phone 8 adoption while its neighbors (Italy and Spain) are on the other side of the chart.

US Stats

Device situation hasn’t changed much in the US. The new leaders are growing their shares at the expense of the older models. As for manufacturers, it’s easy to spot how Nokia just took 2% from Samsung. (64% and 9% last month respectively).

As for carriers – pretty much nothing has changed.

T-Mobile has grown 1% and Verizon lost 1%, but it is nothing of substance.

Germany

We’ve covered Germany in February. Since then both Lumia 920 and Lumia 820 overtook former leader (Lumia 800) to take the two top spots. Lumia 620 has also appeared on the chart at #5. It is also good to see both HTC WP8 models move up, if not in the positions then at least in percentage points.

France

When it comes to HTC, there’s one country (at least) where HTC has the top spot. This country is France and HTC 8S shows no signs of slowing down.

Two months ago it had 21% of French Windows Phone market and it’s up to 27% this month. It would be interesting to hear from our French readers, if they know a specific reason for this?

Italy

Italy is one of the “poster countries” for Windows Phone with double-digit market share, but unfortunately, it’s still a Windows Phone 7 achievement.

Lumia 820 and 920 has grown noticeably over the month, but are still well behind the three dominating WP7 Lumias.

Ukraine

One country we haven’t covered before is Ukraine.

It looks like it has a pretty standard device spread for the central and eastern Europe with WP7 Lumias on top.

China

China was a country in multiple reports of Lumia 920 selling out rapidly. Or was it a supply problem? In any case those days are over and Lumia 920 is now the most used Windows Phone in China. 820 has also almost doubled its share since the last time we checked.

Australia

Australia was one of the countries where Lumia 920 ruled even in February and it has gained another 5%.

820 has claimed the second place in the meantime.

New unidentified devices

Except for devices noticed last month (RM-860 (Lumia 928), RM-892 and RM-893) we’ve seen only one phone we weren’t able to identify. It has a model name of RM-877_nam_att_205. As you can guess, it was spotted on AT&T in the US and all we can say is that it has a screen scale factor of 160, meaning a 1280×768 resolution.