Simply block the incoming calls from some unwanted people in your contact list ... check anfymobile.com/callfilter for latest product updates.. and to get a version compatible with your Symbian phone !!
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Total SMS Control Free
SMS forwarding,Call notification forwarding,Call Recording,Backup,Tracking,Security,Parental Control
mSpy - Phone Tracking and Spy Free
mSpy - The Best Cell Phone Tracking and Spy Mobile Monitoring App 2013