Thank you Jeremiah,
The priority of most phone cameras is portraiture, not macro stuff unfortunately. The reason I suggested using higher resolution is that you can enlarge the image, to compensate for the cameras limitations with better results. Also, brighter diffused lighting is key as image quality falls off rapidly as availble light diminishes. Just some things that work for me (disclaimer-not a wiz at dig/photog) that I thought may be helpful, fiddle around a bit and you'll come to workable formula.
Cheers,
-S-