Block calls and messages from certain people
If you’re receiving calls, FaceTime calls, messages or emails from someone you don’t want to hear from, you can block them from contacting you in the future. If you block someone on one device, they’re blocked on all Apple devices signed in with the same Apple ID.
Important: The person you block won’t receive a notification that they’ve been blocked, and you can still call, message or email a blocked contact without unblocking them. However, if you were sharing your location with them, they do receive a notification that you have stopped sharing your location after you block them.
Blocking a contact in Phone, FaceTime, Messages or Mail blocks them across all four apps.
Find out how: To view a task below, select the plus button 
next to its title.
Block voice calls, FaceTime calls, Messages and Mail from certain people
Phone app on your iPhone: In the Phone app, tap Favourites, Recents or Voicemail, tap the Info button
next to the name, phone number or email address of the contact you want to block, scroll down, tap Block this Caller, then tap Block Contact.FaceTime app on your iPhone or iPad: In your FaceTime call history, tap the Info button
next to the name, phone number or email address of the contact you want to block, scroll down, tap Block this Caller, then tap Block Contact.FaceTime app on your Mac: In your FaceTime call history, Control-click on the name, phone number or email address of the contact you want to block, then select Block this Caller.
Messages app on your iPhone or iPad: In Messages, tap a conversation, tap the name or number at the top of the conversation, tap the Info button
, scroll down, then tap Block this Caller.Messages app on your Mac: In your Messages history, select the name, phone number or email address of the person you want to block. From the Conversations menu, select Block Person, then click Block.
Mail app on your iPhone or iPad: Tap Mail
, select an email message from the sender, tap their name at the top of the email, select Block this Contact, then tap Block this Contact.Mail app on your Mac: Open Mail, select an email message from the sender, click their name at the top of the email, then from the drop-down menu select Block this Contact.
The Blocked icon
appears next to the sender’s name in the message list and a banner is added to their messages to indicate they’re blocked. The banner also provides a link to the Blocked pane of Mail settings, where you can manage blocked senders.
Note: If the sender has previously been marked as a VIP in mail, you must first tap Remove from VIP before you can block them.
Manage your blocked contacts
You can manage your blocked contacts through any of the four apps that allow blocking — Phone, FaceTime, Messages and Mail. Unblocking in one app unblocks across all four apps. Do any of the following to see the list of numbers you have blocked:
iPhone: Go to Settings
> Phone, then tap Blocked Contacts.FaceTime on your iPhone or iPad: Go to Settings > FaceTime, then under Calls, tap Blocked Contacts.
FaceTime on your Mac: Open FaceTime, go to FaceTime > Settings (or FaceTime > Preferences), then click Blocked.
Messages app on your iPhone or iPad: Go to Settings > Messages, then under SMS/MMS, tap Blocked Contacts.
Messages app on your Mac: Open Messages, go to Messages > Settings (or Messages > Preferences), click iMessage, then click Blocked.
Mail app on your iPhone or iPad: Go to Settings > Mail, then under Threading, tap Blocked.
Mail app on your Mac: Open Mail, go to Mail > Settings (or Mail > Preferences), click Junk Mail, then click Blocked.