PIN
PIN (personal identification number) and UPIN (unique personal
identification number) (4-8 digit) help you to prevent others to use
you SIM card without your approval.
PUK
Input the 8 digit PUK (personal unlocking key) to change the
locked PIN and UPIN. Input PUK2 (of 8 digit) to change the
locked PIN2. If the keys are not provided together with the SIM
card, please inquire the local service provider.
Restriction code
You have to input the restriction code (of 4 digit) to use the
operator determined barring function. Note that the function
requires support by SIM card.
