Samsung How To Unblock A Number ^new^ -

Tap the icon (three vertical dots) in the top-right corner. Select Settings from the dropdown menu. Tap on Block numbers . Find the number you wish to unblock in the list below. Tap the red minus (–) or Clear icon next to that number.

If you specifically blocked someone through a text thread, you can manage it within the Messages app. Samsung Galaxy A01 (SM-A015A) - Block or Unblock Messages samsung how to unblock a number