Prank calls...

Call the police and file a report, also call your cell phone carrier and record the times and dates of the calls. and any voice mails you recieve. If this is not the avenue you want to go.

then simply get your cell phone number changed that should stop the calls.

There are services you can pay for to find out who or what number has been calling you. you can also call your service provider and request call block. it blocks any blocked number from calling you, until identified.

Calling the police will do nothing, I have dealt with this recently myself, they will refer you to your phone company. What you have to do is call your phone company, including your cell phone company if they are differnt, tell them you need to report prank calls, what they will do is have you keep a list of the date and time the call comes in, mean while they will put a watch on your phone, when you have 3 of these prank calls on your list you call them back, if they determine that they all came from the same number (they know even if it is blocked to you) then THEY will call the police and make a report, it is up to them to prosocute. You can also ask them to block your phone from accepting blocked calls.

*** *** HERE IS THE ANSWER YOU NEED **** ***
Prank calls are always annoying and even sometimes scary. Here are ten easy steps to stopping unwanted callers.

Don't pick up the phone if it is an unknown caller.
If you pick up the phone, don't talk because that just encourages the prank caller.
Contact your phone company and ask them to trace the prank caller. Some phone companies will put a "trap" on the phone line to trace the caller.
Have your phone company block all anonymous calls.
Take your phone off the hook for a couple of hours.
Use scare tactics (say "trace this call" into the phone because it will make the prank caller think you are telling the phone company to trace their number.)
Use caller ID (*69) to trace the caller.
Find out the general location of the caller using a free reverse cell phone lookup. This will give you a better idea of whether you might already know the caller.
Change your voicemail so that it states that you have been receiving harassing calls and there is now a trap on the line.
Run your own personal reverse cell phone lookup to find out more information about the caller including name, address, where the call is coming from and the phone company of the caller.

These all work very nicely.

If you are going to use a reverse cell phone lookup keep in mind that your prank caller may be calling from several different phone numbers. If this is the case get a membership with a site like ReversePhoneDetective.com which will allow you to search for information on an unlimited amount of numbers.

If you are going to use a reverse cell phone lookup and your prank caller is repeatedly calling from the same number, use a site like Intelius.com in which you pay per search.
The main idea behind a prank call is to make you look fool, or to make fun of you. Don't fall for it, getting angry or showing that you are offended will only motivate more calls!

If your personal safety is being threatened, immediately call the police and file a report.