ok,so I was showing my friends how wonderful and fast the droid is,and as a demo,I go to ebay and sign in with my friend information on ebay website,everthing was ok,but now,I want to sign in with my own info and won't letme do it!!, every time I tried to sign in,the phone will load mi friend username and pasword and delete mine,and I have no clue what I can do next! help please