You will not BLOCK family and friends from overseas by using the code

* * 7 # * #

That will only block anonymous INTERNATIONAL/OUT OF AREA type calls with
no caller ID information. For any legitimate calls there will always be a number showing and these are blocked with the BLOCK NOW button. You can block INTERNATIONAL calls with a preceding number via the code

* * 7 # 00 #

But this would block relatives too, so don’t input this code unless you wish to block your relatives/friends.