Today is the launch day for the Microsoft's latest flagship smartphones, the Lumia 950 and 950XL, which goes on sale in the US through AT&T retail and online stores with a starting price of $149 for a standard two-year agreement. The two amodels close siblings. They differ in screen size (5.2 inches or 5.7 inches), processor (6-core Snapdragon 808 and 8-core Snapdragon 810), and battery capacity (3000mAh and 3300mAh). Otherwise these phones are equivalent: 2560×1440 AMOLED screen, 3GB RAM, 32GB storage, USB Type C with rapid charging, Qi wireless charging, 20MP rear and 5MP front cameras, and biometric iris unlocking.

With the the Lumia 950 and 950 XL, Microsoft is trying to combine the familiar and consistent Windows experience with powerful hardware, OLED displays, Continuum for Phones and Windows Hello beta for Lumia.

One of the most interesting features of the Lumia 950 is the ability to transform your phone to a PC-like experience with Continuum for Phones and the Microsoft Display Dock. What that really means is that in the absence of a laptop or desktop, you can still use your phone to scale apps on a bigger screen when connected, or work on an Office document (some Office features require an Office 365 subscription), browse the Internet and even stream full HD movies downloaded from the Windows Store. Plus, you’ll be able to use your phone independently to do something different, for instance, taking a call or sending a text message while you continue to enjoy apps on the bigger screen.

These devices also pack a new PureView camera that boasts a 20MP sensor, triple LED natural flash, 5th generation optical image stabilization, and Rich Capture. And with 4K video, you can capture and preserve any moment in stunning quality.

Besies teh U.S., the Lumia 950 and 950 XL will be available around the world over the next few weeks. U.S. Microsoft Stores will have both phones available online on Nov. 25 and in the retail stores on Nov. 26.