image was taken from phone and unclear. help?

[tmanni]

If you want a clean, noise-free image, the easest thing to do is to recreate the image from scratch.
Here I use 4 layers (one per colors), the Path tool to create the main shapes, and a combination of Filters > Render > Patterns > Grid and Filters > Distorts > Ripple/Whirl and Pinch to create the lines.