Open your phone app or settings
Tap the menu or More options
Select Settings
Tap Blocked numbers, Blocked contacts, or Call blocking
View the list of blocked numbers
On iPhone, go to Settings > Phone > Blocked Contacts
On Android, open the Phone app > More > Settings > Blocked numbers
On some devices, check Messages or Contacts settings for blocked contacts
To unblock a number, tap the number and select Unblock or Remove