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BARCELONA: Over 2.8 million people have signed up to test the desktop and mobile Windows 10 Technical Previews, according to Microsoft.
Microsoft executive vice president Stephen Elop revealed the figure during the firm's Mobile World Congress (MWC) keynote.
"There are over 2.8 million people registered for the Technical Preview of Windows 10 who have provided over 900,000 pieces of feedback. This is shaping the future of Windows using feedback from people who use our products," he said.
"Through it we are delivering a common experience that will carry over regardless of device form factor."
Microsoft did not break down the percentage of the registrations or feedback messages stemming from the desktop or mobile Windows 10 previews.
Microsoft released the Windows 10 desktop Technical Preview in January and the mobile version in February.
The Technical Preview is available to members of the Windows Insider Program as an over-the-air update, and is designed to help Microsoft find bugs in Windows 10 and gather feedback on the update.
Windows 10 is described by Microsoft as the first "truly cross-device" operating system.
The software is designed to run on multiple devices, including laptops, convertibles, tablets, desktops and smartphones, using a single common code.
It also offers developers a single Universal Apps platform to work on that does not require them to separately code desktop and mobile versions of products.
The figure follows the unveiling of Microsoft's Lumia 640 and 640 XL smartphones and AT&T Mobile Office Suite.
Both smartphones are set to be released in April running Windows Phone 8.1, but will receive an update to Windows 10 when the OS is released later this year.
The Mobile Office Suite is a custom service designed to entice businesses to adopt Windows Phone.
"AT&T Mobile Office Suite offers easy and secure access to email, voice calling services and a variety of other capabilities," explained Elop.
Despite the firm's work pushing Windows 10 to mobile device makers, there are still very few non-Microsoft smartphones confirmed to run the OS.
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