Lol I don't know if you know this or not but this website (Brainly) is used for answering questions about school.
But i will still answer your question,
From any Home screen, tap Messages.Tap the Menu key in the top right-hand corner.Tap Settings.Tap Spam filter to select the check box.Tap Remove from spam numbers.Touch and hold on the desired number you wish to unblock.Tap Delete.Tap OK.
