I sold my iphone 3gs on ebay. Never had a problem with it. Yesterday, I went and erased all of my personal information from the phone and wham, bam, boom, it has locked up. And it has stayed locked since yesterday. I have held the power and home button simultaneously to fix it. I need help, if it doesn't get fixed, I lose over 300 dollars. Help me please. I am mad and nervous about this.