Your calls go straight to voicemail or don’t ring on their end
Your texts show as “sent” but never show “delivered” (in apps that use delivery receipts)
Your texts are never marked as “read” (in apps that show read receipts)
You can’t see their profile photo updates (when profile updates are otherwise visible)
Their profile shows as unavailable or you can’t load their profile page
You can’t find them in search results
Their last seen/online status stops updating
Their status updates (posts/stories) no longer appear to you
You can’t interact with their content in places where you normally could
Your messages remain undelivered or fail to send repeatedly
You see fewer or no recent activity indicators tied to them
They don’t respond despite being active elsewhere
You can’t follow/unfollow or your follow request doesn’t register (on some platforms)
Their account appears deleted or deactivated (which can look like a block)