So...your phone is asking for a PUK code to be entered, and you can't obtain the code here online because the PIN number has changed, correct? If so, a call to Customer Service at 800-331-0500 would help you. The rep that you receive will guide you through a step-by-step process on how to get the PUK code. You will have to give the rep your phone's IMEI information, and possibly the SIM card number. After you have provided what was asked, the rep should tell you what the PUK code is, and your phone should be usable.