Have you forgotten your security/lock code?
Do you still have access to your phone menu?
Do you have a S60v2 phone [Example 6600, 3230 N70 etc]?
If the answer to all the above questions is "Yes" then you can recover your phone's lock code.
All you need is an
application called "UnlockMe".
Install the application and run it. Let it run in the background. Depending upon the lock code itself, the application can take anywhere between 5 mins to half an hour to retrieve your lock code but it WILL tell you your lock code.
* Note: Please try not to call or do anything with the phone when this application is running. It might slow down the process.