Summary: The first Windows 10 release specifically targeted at phones is finally available. Here's what you'll find inside.
1. Windows 10 preview for phones, installed :
If you successfully clear all the hurdles, you'll see this version information on the About screen.
2. Using the Insider app to upgrade :
As with the desktop preview, you can specify that you want to be on the Fast track, getting new builds as they're released. More conservative testers can opt for the Slow track and let others work out the bugs first.
3. Better organization for apps and settings :
For apps, one welcome change is the addition of a Recently Installed group at the top of the Apps menu, which obviates the need to hunt for a new app.
The change is even more dramatic in Settings, where the endless scrolling list has been replaced with a neat set of categories. The iconography is familiar too, matching its counterpart on the Windows 10 PC editions.
4. File Explorer and OneDrive :
The OneDrive client is essentially the same as the one in Windows Phone 8.1, offering support for both OneDrive (personal) and OneDrive for Business accounts in a single app.
5. Lock screen and Start improvements :
The full-screen background image for Start, though, takes some careful planning. In my experience, it just adds confusion and make tiles harder to read. You'll need to experiment to find an image that works well.
6. A new, universal Photos app :
Editing tools allow you to crop images quickly, with preset sizes that conveniently include a setting for turning a photo into a lock screen image.
7. Unchanged Office and a new virtual pointer :
More interesting in this preview is a new addition to the onscreen keyboard. Press and drag the the small nub just below the shift key (on the left side of the keyboard) to move the insertion point left, right, up, or down.
It's a particularly useful tool when editing long documents.
8. Notifications and Cortana :
The Notifications Center has a slightly cleaner look and feel and adds the option for more than four Action buttons when you tap Expand.
Cortana should look familiar if you've already used this feature. Eventually, you'll be able to summon her assistance with a simple "Hey Cortana."