Important tips if you have been the victim of harassing phone calls:
If you feel you are in immediate danger, call 911
After completing your report, you may wish to contact your phone service provider (as noted on your telephone bill)
Tell your phone service provider you have filed a police report and give them the police report number you receive after your report has been approved
Follow your phone service provider's instructions
Keep track of further harassing calls - when they occurred and the number they are from (if you have caller ID).