Samsung galaxy nxt is one of the best mobile phones that runs on the 6.0 android os ( marshmallow) it is comming with 3 gb ram and 64 gb of rom user can expant it 256 gb.
The camera quality is also superv that has on rear it is 13 megapixel and in front is is 8 .
This is a brand so not any type of complaint is comming about it is really a nice phone with a good processor .
Not any hanging problem
Best display 5.5 inch
Nice look and design
Cost also not so high for this phone
Sound quality also good
I hope it will be helpful