firstly i would talk to about its design
Design
It’s a reassuringly solid-feeling slab, with gently rounded edges. While it won’t gain any marks for originality – which phones do? – the Lumia 950 XL
secondly its display
Display
The first thing to know about the screen is that it’s AMOLED. One aspect of this is that when the screen displays blacks, it’s actually off, so it’s pretty energy-efficient.
THE MAIN THING:- Performance
Along with its larger frame, the 950 XL also delivers a modest performance boost over the 950, with an additional two cores and 200MHz of speed from a Qualcomm Snapdragon 810 CPU, but the same 3GB of RAM powering Windows 10.
THE CAMERA
It’s a 20-megapixel affair with optical image stabilisation and a bright f/1.9 aperture. Crucially, it has a 1/2.4in sensor, which means that it lets loads of light in for great quality in low light.