See Blocked Numbers Iphone Extra Quality
To unblock a number, follow the same steps as above and tap on "Edit" in the top-right corner. Then, swipe left on the number you want to unblock and tap on "Unblock."
To see blocked numbers on your iPhone, the most direct method is to navigate through your app . Whether you’re trying to manage unwanted spam or accidentally blocked a friend, Apple stores all blocked entries in a centralized list that is accessible through several different communication apps. Quick Guide: How to See Blocked Numbers see blocked numbers iphone
Tap Unknown to see blocked numbers that aren't saved in your contact list. To unblock a number, follow the same steps