Note: After unblocking, you must send a new friend request.
Go to your Profile > Three Lines > Settings and Privacy > Privacy . Scroll to the bottom and select Blocked accounts . Note that unblocking does not automatically restore a following relationship; you will need to re-follow them manually. how to unblock someone
System-level blocks prevent standard SMS and cellular calls from reaching your device. Note: After unblocking, you must send a new friend request