How do you turn on the speakerphone for a samsung sunburst touch screen?

I accidentally turned on the speakerphone one time for my samsung sunburst touch screen phone, however I am unable to figure out how to get this to work. Any one able to help?|||Make sure the phone is unlocked while in a call, and on the screen there should be a sliding button that has a speaker on it. Use that to enable/disable speaker phone. Consult the owner's manual if you are still having problems.