please please please help unlock 8310 code

Please could you provide codes for Nokia 8310

Network. Not sure UK
imei is

350844109132776

it may be orange,vodafone or 02

will accept the vodafone pay as u go sim of the person i bought it of but not mine which is vodafone pay as u go ,,just asks for security code but she says she never put one in,,,,

yours hopefully and begginly:(

security code is a code on the phone mate

normallly 12345, beware u can only have a few wrong attempts b4 the phone gets locked,

u will need to clear the security code via datacable and software i think.