The most common way to unblock a contact is through the Phone app. This method works for Google Pixel users and many other devices running "Stock" Android software. First, open your Phone app and tap the three-dot menu icon in the top-right corner. Select Settings and then navigate to Blocked numbers. Here, you will see a list of every number you have restricted. To unblock one, simply tap the "X" or the minus sign next to the number and confirm your choice when prompted.
Depending on whether you want to unblock a specific phone number or a list of numbers you have blocked previously, the steps vary slightly by Android version and device manufacturer (Samsung, Google Pixel, Motorola, etc.). how to unblock numbers android