What is the black oval on the back of a ipod touch?

Answer 1

No, its cuz wifi signals dont go through steel very well, and the plastic allows for better wifi signal pass-through

Answer 2

you expect me to know? FIGURE IT OUT YOURSELF!!!!! LAZY BUM

Answer 3

You may be referring to the Home button, which is a black circle with a white square outline in it. This allows you to exit apps that you are in and return to the home screen.