Smartphone cameras dont have the best bokeh from their wide-angle lenses, meaning its hard to achieve DSLR-like background blur with medium range shots (unless you have some fancy tools like the Duo Camera on the HTC One M8). How do you achieve that pleasant blur? Simply get closer to the subject of your shot, utilizing the close macro range of the focus system.
Some of the best photos Ive achieved with a smartphone have been macro-style, using the small amount of bokeh thats achievable to my advantage. On an f/2.4 camera system, like the LG G2 or Nokia Lumia 930, dont expect anything incredible; but if youre blessed with an f/2.0 system like the Sony Xperia Z2 results can be surprising.