nokia 7650 fonelock code

[Toplad]

hi
i have a nokia 7650 which i bought sim free however i changed the fone lock code from 12345 to sumthing ive forgotten is there a code i can use to reset the fone lock

my imei is 350774100141080
im on o2 uk but through a third party provider called genesis
i hope u can help as i want to use my new sim card
many thanks

Toplad