Attention! To release do you need the unlock code which you can get on websites how are you:
unlock.nokiafree.org
www.lur.nu/unlock/nokia_eng.php
www.peters1.dk/unlock/nokia/online.php?sprog=es
Turn off your mobile phone and peel off the SIM card; Once done, put back the battery and turn it on.
If you already have your code like this # pw + 876025783402147 + 1 # (example), you have to press pad, press the star key several times until the 'p' and again asterisk until the 'w' and '+', and eventually your number pad.