Samsung SGH-N628 - Manual (Page 66)

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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 5-3-1), 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.
Reference Information
Access Codes
There are several access codes that are used by your
phone and its SIM card. These codes help you protect
the phone against unauthorised use.
The access codes (except for the PUK and PUK2
codes) can be changed using the Security Settings
menu options (5-3). See page 101 for further details.
Phone Password
The phone password can be set to avoid unauthorised
use of the phone. The password generally supplied
with the phone is 0000. You are advised to change it
before you start using your phone.
Keep the new password secret and in a safe place,
separate from the phone.