Mobile phone cameras have evolved at a rapid pace, Samsung has been leading the way in terms of pixel resolution and depth of field ability, but Apple is right there in the mix now.
With a range of apps to help maximize the control of the lens, raw data and 16MP capabilities, people who know how to control device can achieve some really high quality photographs.
If you are not shooting high-speed or large format projects, our phones are a great option for "in the moment" shots now-a-days. It's amazing the power we now hold in out pockets.