My client forgot his F-secure password
He cant access his phone any more
He desperately wants to access his phone and retrive contact number
Unfortunately Mobile Security for Symbian has reached its end of life on December 31, 2014 (http://community.f-secure.com/t5/Security-for-PC/Mobile-Security-for-Symbian/ta-p/65063).
You may try the instructions provided in the thread below: