The problem? You can’t remember how you blocked them, and their texts still aren’t coming through.
Even if you deleted the text message thread, the number remains in your blocked list within your Settings or Phone app. You can unblock them using Method 1 or Method 2 above at any time.
Blocking in WhatsApp is separate from your phone’s main block list. Even if you unblock them in your phone settings, they’ll stay blocked on WhatsApp until you fix it here.
: Scroll to the bottom and tap on Blocked Contacts . Unblock the Number : Tap Edit in the top-right corner.