Samsung GH68-03401A - Manual (Page 72)

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PUK code
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 the code,
contact your service provider.
PUK2 code
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 code. If you lose the
code, contact your service provider.
Barring Password
The 4-digit call barring password is required when you
use the Call Barring function. You obtain the password
from your service provider when you subscribe to this
function.
PIN code
The PIN (Personal Identification Number) protects your
SIM card against unauthorised use. It is usually
supplied with the SIM card. When the PIN Check
feature is enabled, you must enter the PIN each time
you switch on the phone.
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 code
The PIN2, supplied with some SIM cards, is required to
access some functions, such as charging unit 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.