Screenshots from the latest Windows 10 Tech Preview build for phones.

I briefly installed the latest Windows 10 Technical Preview for phones on my Lumia 1520 today, but has to revert to 8.1 because the OS has no MMS settings yet, rendering my handset useless. Here are a ton of screenshots I snapped before blasting the OS off my phone. Keep in mind, this is more of an alpha than a beta, and much work remains to be done. A few universal apps make an appearance, but NFC payments (zNFCPayments) is missing from this build.
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Screenshots from the latest Windows 10 Tech Preview build for phones.

Spartan arrives in latest Windows 10 build, with Cortana hitching a ride.

Cortana leaps forth on Project Spartan.
Cortana leaps forth on Project Spartan.

A new Windows 10 build has landed for Windows Insiders who are in the Fast ring, keeping Microsoft’s promise of a much more rapid build release cycle. Not much has changed, but there have been bug fixes, a revamped Calculator, and a new browser.

A new Calculator app is included in the latest build, and it keeps a history of your calculations.
A new Calculator app is included in the latest build, and it keeps a history of your calculations.

The new browser is currently called Project Spartan, continuing Microsoft’s trend of using Halo codenames for new products, such as Threshold, and Cortana. An official name for the browser has not yet been decided, but it will have “Microsoft” somewhere in the name.

This version of Project Spartan is far from complete, with many features still missing or only partially implemented, but I took it for a spin anyway, on a tablet and on a desktop too.

The UI is minimalist, with the tabs residing on the application bar rather than below it, which provides a larger viewing area over existing browsers. The browser is a Windows App (e.g. Metro or Modern), enabling more flexibility for the UI than traditional Win32 apps. Windows Apps are being updated to support drag and drop and other more traditional features, so any awkwardness which was present in Windows 8 should be ironed out by RTM.

Cortana is present as well. Typing search phrases into the address bar invokes Cortana and she will provide an answer without needing to venture out to a search engine or another site.

Reading view in Project Spartan, with the Actions menu invoked.
Reading view in Project Spartan, with the Actions menu invoked.

Reading mode is a nice touch, something which Chrome lacks, and provides more options than Internet Explorer does on Windows 8.x. The Actions menu is to the point, with no confusing or pointless options crowding it.

Google Chrome and Microsoft's Project Spartan displaying results on the HTML5 test.
Google Chrome and Microsoft’s Project Spartan displaying results on the HTML5 test.

Performance of the app over all is a little sluggish, but that’s understandable, as this is more of an alpha than a beta. On touch, it lagged a lot, but such lag was not as noticeable with a mouse and keyboard.

I have not encountered any broken websites with Spartan, but rendering takes a little longer than on Chrome, likely because I have an ad blocker installed on Chrome, which helps with loading times.

On the HTML5 test, Chrome scores 523, while Spartan comes in with 375. Not show stopping, but definitely something Microsoft will continue to work on.

Over all, I feel it’s a solid start, and I look forward to seeing further builds of Project Spartan.

Spartan arrives in latest Windows 10 build, with Cortana hitching a ride.