How to block a user in iPhone
To block a user in iPhone you need to open him in your contacts or “Favourites” and scroll right down. We need the last option «Block this Caller»:

iOS will give a warning that you are not going to receive any calls (usually and in FaceTime) and messages from this user.

Press «Block Contact» once more. So, in order to block any number you need to add it to your contacts first.
How the calls from blocked users are shown in your iPhone
iPhone fully excludes the possibility for you to see a missed call or get any notification. There will be no information in your call list as well. The same applies to text messages – they will simply never reach you. At this, if you unblock a user, his calls and messages still won’t appear.
How to see the list of all blocked users in iPhone
In order to see all the users you have blocked, go to «Settings» -> «Phone» -> «Call Blocking & Identification». There you will see the list of those users from whom you are not going to get any calls:

Here you can also add new users.
There is another list of text messages. Go to «Settings» -> «Messages» -> «Blocked».
If you have any further questions, please do not hesitate to contact our help desk!