Samsung SGH-R225LV-XAR - Manual (Page 55)

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PUK
The PUK (Personal Unblocking Key) is required to
change a blocked PIN. The PUK may be supplied with
the SIM card. If not, contact your local service
provider.
If you key in an incorrect PUK ten times in
succession, the SIM card cannot be used anymore.
Contact your service provider for a new card.
You cannot change the PUK. If you lose it, contact
your service provider.
PUK2
The PUK2, supplied with some SIM cards, is required
to change a blocked PIN2.
If you key in an incorrect PUK2 ten times in
succession, you cannot use the functions requiring
the PIN2. Contact your service provider for a new
card.
You cannot change the PUK2. If you lose it, contact
your service provider.
PIN
The PIN (Personal Identification Number) protects
your SIM card against unauthorised use. The PIN is
usually supplied with the SIM card. When the PIN
Check feature is enabled (menu option 4-3-1), the
PIN is needed each time the phone is switched on.
If you key in an incorrect PIN three times in
succession, key in the PUK and press the OK soft key.
Key in a new PIN and press the OK soft key. Key in
the new PIN again and press the OK soft key.
PIN2
The PIN2, supplied with some SIM cards, is required
to access specific functions, such as call cost
counters. These functions are only available if
supported by your SIM card.
If you key in an incorrect PIN2 three times in
succession, key in the PUK2 and press the OK soft
key. Key in a new PIN2 and press the OK soft key.
Key in the new PIN2 again and press the OK soft
key.