How do I block or unblock someone?
To block someone:
  1. Tap their username to open their profile
  2. Tap (iPhone/iPad) or (Android)
  3. Tap Block User
To unblock someone, follow steps 1-2 above and then tap Unblock User.
People aren't notified when you block them. Learn more about blocking people.
Note: You can block someone using the Instagram app on your phone or tablet, but not on the web.
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