How do I block someone from calling me

Check phone settings, and check call forwarding always is off, you can also check call blocking. Top right corner after you press phone icon.

Hi Jeffrey,
Thanks a lot for posting your question on Fixya.
First of all you should find out if that person has blocked your number or its something else. https://www.answerslave.com/know-someone-blocked-number-iphone

It could be a do not disturb mode which can be identified by calling the second time immediately and many other reasons.

https://www.donotcall.gov/ register that number with this site,, its a telemarketer and they won't stop until you add that number to the link I sent to you,, if you try and call it back, its going to say ,, unused number because they block incoming calls, its used for outgoing only and usually say some garbage about you've won blah blah blah,, Its a scam, if your phone service has the ability to block numbers do that , you can check this link for other numbers that may call you also
http://800notes.com/AreaCode.aspx/1-986

sir go to the message setting and select the scremed message option and then enter the perticular number to stop the calls and the messages.you cannot recive any messages and cellphone calls from the number..................

just check there must be a option called Black list or call reject in your phone book option .activate it and put in the number you want to block. from calling you ,you cant stop any body from texting you

as far as i know there is no way to block a specific phone number anyone cellphone...

or you can try this one

Some phones have an option called a rejection list. It would be under call settings if you have this option. You would simply add the number to the rejection list and the call wouldn’t go through. Actually the caller just goes straight to voice mail.
If you do not have the rejection list, then assign a silent ringtone to the person. That way the person calls, you won’t hear them calling. You can just ignore the call.
Maybe try this…text the person saying “Your messages have been blocked by (state your own number). Message 111.” The person will think you blocked their text messages. If they text again, reply with the same message.
You also change your number if you wish to go that far. You also tell the person that every call and text is now being forward to the police. That should hopefully scare them and then they would stop

You're going to have to call your carrier and ask them to block the number for you, you can't do anything on your phone.
If it's a telemarketer, you could put your number on one of those "Do Not Call" lists, but it usually takes up to a month for the calls to stop.

THIS FUNCTION IS NOT MOBILE FUNCTION. IT IS COMPANY FUNCTION. CALL UR COSTMUR CARE (TOLL FREE) AND ASK HIM FOR BLOCK THECONTAC