How to block a phone number on my IPhone 4?

A number I don't recognize keeps calling me every freakin 15 minutes, almost like sexual harassment. It's been going on for 3 days now, I don't answer I always press ignore, but I want to block this number, do I have to call my carrier? I have sprint.

I believe there might be some special software that allows "blackmail" option. But you might considering googling that, coz there might be many types.mainly if you jailbreak

I'm sorry to hear about your inconvenience. I've had calls like that and it is indeed frustrating.

And you're right. Call blocking option is primarily controlled at the provider level. This means you can simply contact your telephone company and have them block the caller's phone number. That should filter all the caller's future calls from coming through.

Lastly, I suggest you report the phone number to http://www.callercenter.com for phone call harassment.

There are applications that do this if you have jailbroken your iPhone. Without jailbreaking however there isn't a way to block a single or specific incoming number. I've known people that have requested their provider to block a certain number and without a very good (usually legal) reason, they won't do it.

You might want to know your sexual harassment rights here: http://www.netwind.com/