iPhone Want to go offline for a while? Swipe up from the bottom edge of the screen to open Control Center, then turn on Do Not Disturb or Airplane Mode. See Do Not Disturb and Travel with iPhone.
Block unwanted callers. On a contact card, tap Block this Caller (you can see a caller’s contact card from Favorites or Recents by tapping
). You can also block callers in Settings > Phone > Blocked. You will not receive voice calls, FaceTime calls, or text messages from blocked callers. For more information about blocking calls, see support.apple.com/kb/HT5845.