It reminds me of my first true smartphone, the Audiovox SMT 5600, a rebranded HTC Typhoon, before HTC even sold phones. It was small, so it looked like an everyday phone and, importantly for me at the time, it ran Windows Mobile 2003 SE.
Source From: http://www.techradar.com
This 5.2-inch phone does try a few interesting tricks so that it's not too basic. Its iris-scanning technology makes for a nifty unlock method and Continuum lets me scale the software to TV proportions for a useful desktop-like mode.
Lumia 950 lays the foundation for Windows 10 Mobile, and it's off to a better start, even if Lumia sales are dismal. I felt like that about the Audiovox SMT 5600, too, before the Redmond company blew it in mobile.
But now it's up against the best phones ever made, like the similarly-sized Samsung Galaxy S6, iPhone 6S, LG G4 and Nexus 5X. Does it really have what it takes to win converts from iOS and Android, or keep Windows Phone 8.1 users from defecting? Clearly, it's not that simple.
Design
Lumia 950 does its best impression of an average Android phone, almost as if it's trying to get you to buy it, take it home and say, "Too late! You're running Windows now." It reminds me a lot of my Google Nexus 5X in size, color and styling.
You'll also never mistake this for a "premium" handset, either. The Lumia 950 is enveloped with a one-piece plastic shell that overlaps its Gorilla Glass 3-protected screen. While the front is in a glossy black, the rear cover comes in matte white or matte black. Gone are the fun, vibrant colors of orange or lime green, as seen from last-generation Windows phones.

The microSD card and battery are easily accessible behind the removable plastic cover, a boon for professional users. Even the expandable storage slot can be accessed without removing the battery (but the same doesn't apply to the the stacked nano SIM card underneath of it).

The top of the Lumia 950 frame has a normal headphone jack, while the right side houses a power button and volume rocker, or more accurately the volume rocker and power button. They're in reverse order from many of today's phones, and that's how Nokia had them. Sadly, there's no double-tap-to-wake function. In fact, the only way to turn on this phone is to press that tiny power button on the right side.

Instead of the speakers I was asking for, I got something else that's long been on my wish list: a dedicated camera button. Truthfully, I've been asking for this for a while, to the point where I have gotten used to – and like – the Samsung Galaxy Note 5 double tap mechanic for launching the camera app, but I'll certainly take this, too.

Display
Windows Mobile 10 has a dark theme turned on by default, and it really lets the deep blacks and Microsoft's familiar blues shine on this 5.2-inch AMOLED display.
Brightness has become more important for me than resolution ever since we hit 1080p. I'm now more interested in seeing my smartphone in bright sunlight at the beach, not being able to appreciate extra pixels too small to detect with the naked eye. The Lumia 950 does well enough outdoors and has wide enough viewing angles, but it could be brighter at its max.

Windows 10 includes a one-handed-use mode, sort of like Apple's Reachability mode. It drops the entire screen down and stays there even when you tap into other menus. You have to tap the Windows home button to revert it or let the screen sit idle for a while. This helps that 5.2-inch display feel a smidge smaller for critical, one-handed touchscreen tapping on the subway or tube.