How to Download and Install Windows 10

Windows 10 Technical Preview for phones is now available to download. This is a pre-release version of Microsoft's upcoming mobile operating system. You should only download this if you want to try a new operating system on your Windows Phone device. Since this is beta software, many of your favourite apps may not work on it and upgrading to it right now is not recommended on your primary phone as the preview is still very much a work in progress.

Supported devices

Microsoft says only six Lumia phones can download and install Windows 10 Technical Preview for phones. These are:

• Lumia 630
• Lumia 635
• Lumia 636
• Lumia 638
• Lumia 730
• Lumia 830

Backing up your data

This is beta software and hence can be very buggy. That's why we recommend that you make a complete backup of your Windows Phone first. We have written a detailed guide on how to backup and delete all data on your Windows Phone device and you must go follow all the steps listed there before proceeding.

1. Head to the Windows Insider page.
2. Click Get Started to sign up for the programme.
3. Enter your Outlook.com email address and password.
4. Click Sign in.
5. Read the terms of service, scroll down and check I accept the terms of this agreement (required).
6. Click Submit.
7. Scroll down and click Phone.
8. Scroll down and click Get the preview.
9. Download the Windows Insider app on your Windows Phone device.
10. Open the app and sign in using your Microsoft account.
11. Tap Get preview builds.
12. Here you'll have to choose between receiving OS updates as they're released or after some bugs have been fixed. Tap Insider Fast to stay on the bleeding edge or pick Insider Slow if you'd like a slightly more reliable build.
13. Take a look at all the warnings and then tap Accept.
14. Tap the Windows button on your phone.
15. Go to Settings > Phone Update.
16. Tap Check for updates.