Check the SIM card holder, packaging, or carrier welcome letter for the PUK code
Log in to your mobile carrier account or app to find the PUK code
Contact your mobile carrier’s customer support to request the PUK code
Use the carrier’s official website or self-service portal if available
Provide the SIM card number and account verification details when asked
Enter the PUK code on your phone when prompted
Set a new PIN after the PUK code is accepted
Do not guess the PUK code too many times, as the SIM may become permanently blocked