A SIM card, or Subscriber Identity Module, is a small, removable card that stores information about your cellular network subscription. It includes your phone number, account information, and other data. If you enter the wrong PIN (Personal Identification Number) too many times, your SIM card will be locked, and you will need to enter a PUK (PIN Unblocking Key) code to unlock it. However, there are ways to unlock your SIM card without a PUK code.
One way to unlock your SIM card without a PUK code is to contact your cellular network provider. They will be able to provide you with a PUK code or unlock your SIM card for you.