How do I block a phone number from calling me?

How do I block a cell phone number from calling me on my cell phone

I need directions on how to block a specific cell phone number from calling my cell phone.

There is this girl at my school that somehow got my cell phone number. I need help, I want to know how to block phone calls f...

I have the prepaid cellphone service net10 and I was wondering how to block a person's number with that service?

I want to call someone but I don't want them to know my number. What do you dial so it will block the number so they can't se...

just wanna know how to block the number because whoever is calling is doing so under restricted.

It doesn't work...just get a recording stating "we're sorry we can not accept your call as dialed"

I have a sprint phone and a number keeps calling me. Is there some way I can block it???

I have a big problem with the father of my child and his 'girl' friend... I need to know how to block her cell phone number f...

I am getting harrasing texts and calls from someone. I would like to block them from calling or texing me.