On mobile devices:
In the conversation list:
- Swipe right on the name of the person you'd like to block.
- Tap BLOCK.
- Tap BLOCK again.
The conversation with the blocked person is hidden from the active and archived lists. A blocked person will not be explicitly notified that you've blocked them.
To unblock a person:
- Tap People.
- Search for them by their profile name or username in the search field.
- Tap their name in the search results.
- Tap UNBLOCK to allow them to contact you again.