Credit for a Helping Hand

When I got into class the other day, my professor told me that he was having some trouble with his mobile phone, and he was wondering if I could help him out.  I asked him what the issue was, and he told me that his daughter had gone in and changed all the Ringtones, and he wanted to change them back.  I told him that I would need to see his phone so I could check it out.  He told me that he would give me a bit of extra credit if I could get it fixed for him.  I told him that I would reprogram the whole thing.