AdDuplex: Windows Phone installed base hits 50 million

The full AdDuplex report is now out, and in it AdDuplex does some speculation about the number of Windows Phones in current use.

They estimate around 12 million Windows Phone 7 handsets are still in use, decreasing at 2% every month.

At the same time they estimate around 38 million Windows Phone 8 handsets are in use, with this number still increasing. If 8 million handsets are sold in a quarter this number should increase by around 2.5 million per month.

This is a significant installed base, but unfortunately remains dwarfed by the other mobile ecosystems.  In fact according estimates by Evercore group the iPhone hit 50 million in September 2010, 3 years and 3 months after its first release.

On the other hand by that measure Windows Phone is tracking the iPhone well, with the OS also hitting 50 million active users 3 years and 3 months after release, having been introduced in October/November 2010.

The iPhone hit 100 million active users only a year later, in September 2011.  Do our readers think Windows Phone can emulate that feat? Let us know below.

Via Winsupersite.