My phone got locked with PUK code.. i dont know it!?

Oh boy, this happens to me all the time. What you need to do is call AT&T (you can find the number online, but it varies from place to place), and just tell them that you need your PUK number. You will be asked for your phone number and/or IMEI number. If you don't know your IMEI number, you can get it by putting *#06# into your phone. It should pull up even though your phone is locked. Once you have the IMEI number, and your cell phone number, call AT&T. They are super nice about it. Just follow their directions, and at the end they will ask you for your PIN code, so just put a code you can easily remember. You shouldn't even need your dads' account information to do it. Hope this helps!