Nokia 6020 unlock code

Can you please help me unlock my Nokia 6020. I want to be able to use another sim card in it.

Model: Nokia 6020
Imei: 354532014501971
Currently locked to: MTN
Country: NIGERIA

Thanks

 

#pw+433827056170531+7#
or
#pw+433927056170531+7# if needed

 

Thanks for your help, but the first code did not work and each time i try the second one, i get the message "cannot undo restriction". What do i do?

 

http://forums.afterdawn.com/thread_view.cfm/405992