First, it's a phone, not an expensive SLR or whatever. Secondly you've shown us one picture which didn't look to me like it was taken in anywhere near optimal conditions for any non-expensive camera. Is that a picture of a person or a picture of a poster or magazine or something?
Give us a couple of more pictures in different lighting or settings so we get a better idea if it's the camera or the conditions under which the image was taken.