Unlock/Restriction codes are available from your network only.
Enter the 15 digit Network Unlock Code as follows:
#pw+ followed by the 15-digit unlock code then +1#
For example: #pw+123456789012345+1#
The keypad will only allow you to enter numeric digits.
To enter p, press the * (star) key three times.
To enter w, press the * (star) key four times.
To enter +, press the * (star) key two times.
5. The phone will display ?Phone restriction off?. The handset is now unlocked.
I should add that you only get 5 attempts at unlocking with a code, after that it locks you out for good, and its a NCP (Nokia Care Point) thats required after that. (Thanks shunts) 
Note: Removing the SIM restriction does not remove the network branding.
Message Edited by petrib on 14-Nov-2008 10:49 AM
Message Edited by cjlim on 03-Jun-2009 08:09 PM