Go to main screen, select SETTINGS, once in settings select GENERAL, scroll down all the way to the last item RESET and select it. You will have the option of re-setting everything or just parts of the IPhone as needed.
Good luck :->
I locked myself out once because I needed a PUK code for the Samsung Impression, I called customer...
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I locked myself out once because I needed a PUK code for the Samsung Impression, I called customer care service and then they gave it to me, when I put it in it said I had to change my Pin code, so I changed it and now I forgot it.
How do I change it again ?