

It's a good idea to have your device connected to a charger, ensuring the update is able to finish without issue.

Once the app is installed, it will scan the specifics of your device and guide you through the upgrade process. Finally, download and install the Windows Insider app from the Windows Phone Store.Next you'll need to sign up for the Windows Insider Program if you haven't already.You can do this by launching Settings and going to About followed by Info. Make sure your device is running Windows Phone 8.1.The team in Redmond has stated new devices will be added. If your device isn't on the list, be patient.

It's fairly short: Lumia 630, Lumia 638, Lumia 635, Lumia 730, Lumia 636, Lumia 830.
