Whats a PUK CODE??? help?

When you put 3 subsequent wrong pin code, pin code is damaged; as a chance to get the sim usable you had the option to put PUK code. When you first get the connection, your network company supplies it to you. If you have misplaced the PUK code list, you have to go for replacing the SIM from your network company. I suggest you to bring your phone to the customer service of your network company; I hope, they will be able to solve your problem easily.