Microsoft has released a Technical Preview of Windows 10 for mobile on a selected number of Lumia devices.
Microsoft engineering general manager Gabe Aul announced the preview build in a blog post, revealing that it will initially be available for the Lumia 630, Lumia 638, Lumia 635, Lumia 730, Lumia 636 and Lumia 830.
Windows 10 was unveiled on 22 January, described 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.
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.
"This preview is still very much under development and you're going to see some rough edges. We're sharing it with you so you can be with us at every step, and provide your feedback to help make this the best release ever," explained Aul.
"You will encounter bugs. You will see experiences that are clearly just not done yet, and a UX that lacks polish at this point. Don't worry! It will improve as we go with new features, stability and performance improvements."
The initial release adds full-sized background images, more quick actions in Action Center, interactive notifications, enhanced speech-to-text and a reworked Photos app. Aul promised that new functions will be added in the near future.
"In upcoming builds we'll also include the new Mail and Calendar Universal Apps from the Outlook team in Office, as well as IP-based messaging from Skype and others, integrated directly into the Messaging experience," he said.
He added that the lack of features is owing to Microsoft's focus on improving Windows 10's back-end, cross-platform services.
"Much of our work until this point has been on platform development rather than the completeness of the UI, so a lot isn't immediately visible - like the fact that we have a common OS core and app platform across PC and phones," he said.
"But those ‘fundamentals' represent a ton of work and are going to enable a lot of cool things to come, like apps that work seamlessly across devices, consistent manageability of devices, and the ability to run a whole new generation of Office Universal Apps on all of your Windows 10 devices."
Check out V3's hands-on for an in-depth look at the Windows 10 desktop preview. Also make sure to check back later for our opening impressions of the Windows 10 for Mobile Technical Preview.
Dust storm on Titan only the third Solar System body where such storms have been observed
New technique could enable quantum computers to scale-up to millions of qubits
Systrom and Krieger taking time off "to explore our curiosity and creativity"
Comcast's £29.7bn winning bid more than twice the £13.7bn Rupert Murdoch valued Sky at just eight years ago