Windows Phone 8 Update 3 with Nokia "Black" update
2.2 GHz quad-core Snapdragon 800
450 Mhz Adreno 330
16GB (AT&T) or 32GB (everyone else)
Dual Band 802.11b/g/n/ac, Bluetooth 4.0 including Low Energy, GPS, GLONASS
Micro USB, headphones
20MP rear camera with OIS, f/2.4 aperture, 1.3MP front camera
$99 with a two year contract
So here's the thing about the Lumia 1520. It's huge. Really, absurdly huge. I know it's not the first super-sized smartphone, but it's the first I've ever used in any meaningful capacity and it's just vast. There are apartments in Manhattan that boast less square footage than the Lumia 1520.
The Lumia 1520 represents a number of Windows Phone firsts. It's the first Windows Phone with a 1920×1080 screen. It's the first Windows Phone with a six inch screen. It's the first Windows Phone with a Snapdragon 800 processor, which in turn makes it the first quad core Windows Phone. It is, as far as I can tell, the first Windows Phone with 802.11ac Wi-Fi.
And it's the first Windows Phone that doubles up as a coffee table, or, in a pinch, a spare wing for a 747.