Nokia 3555 - Manual (Page 30)

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PUK codes
The personal unblocking key (PUK) code and the universal personal unblocking
key (UPUK) code (8 digits) is required to change a blocked PIN code and UPIN
code, respectively. The PUK2 code (8 digits) is required to change a blocked
PIN2 code. If the codes are not supplied with the SIM card, contact your local
service provider for the codes.
Restriction password
The restriction password (4 digits) is required when using the Call restrictions.
See "Security," p. 66.
3. Call functions
■ Make a voice call
1. Enter the phone number, including the area code.
For international calls, press * twice for the international prefix (the +
character replaces the international access code), enter the country code,
the area code without the leading 0, if necessary, and the phone number.
2. To call the number, press the call key.
To increase the volume in a call, press the volume up key and to decrease
press the volume down key.
3. To end the call or to cancel the call attempt, press the end key, or close
the phone.
To search for a name or phone number that you have saved in Contacts,
see "Search for a contact," p. 51.