Call Blocker is a handy call manager app for Symbian. It allows you to block unwanted calls automatically based on numbers you don't want to call you.
Call Blocker lets you define black lists and white lists of contacts or phone numbers, then set up rules for how to handle those calls. You can choose to reject a call, do nothing or reject the call and send a custom SMS to the caller.
Call Blocker makes for a handy way to block unwelcome callers, but you need an internet connection for it to work.