Setting ISO = setting light capturing sensitivity. Higher the ISO the more sensitive it is, and of course the bigger the size of the image grain (less quality)

To get good clear picture, make sure the light is bright enough.

Avoid back lighting (light shining from the back of your subject), this will cause your subject to be darken. to correct this, use flash if you have to take back lighting pictures (if your phone camera has flash) Or, reflect some light onto your subject.

In case you are new to photography, go learn some basic photography techniques. This helps a lot in taking good picture.


just my 2 cents. =]