| PUK |
SIM Cards have a number of security features to prevent unauthorised use. One of these is the requirement to enter a PIN code (if enabled) into a phone when it is turned on. The PIN number is determined and set by the user of the SIM and only persons provided the PIN number are able to access the SIM. If the PIN code is entered incorrectly three times in succession, the phone will display "Enter PUK Code" or "SIM Blocked". The PUK (Personal Unblocking Key) Code is required to unblock the SIM to allow use. Each SIM has a unique 8 Digit PUK code.
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