Chosen Solution
my phone smashed on floor and had a bunch of cracks on screen, touch is working , 3D touch is also working, i just want to replace upper glass. is it possible? should i use iphone 6 glass on my iphone 6s?
It is possible but very difficult, way more difficult than any other repairs on this website. And you should not use parts from other models, ever.
Replace just the glass is very difficult.. You can easily replace glass and display together on your own