What is the restriction code of Nokia 6233 Mobile set?

I've a Nokia 6233 mobile set of "3" mobile. It is bought from Uk. Now i've it in Bangladesh. When i am inserting a sim of bangladeshi network it asks for a restriction code. Without it the mobile is not working. So I need a restriction code to active this phone set. So plz help me by providing the restriction code for Nokia 6233.