I also have this problem ever since I installed the new version of Norton mobile. It shows the calls on my notification bar, and are able to go as far as leave voice mail. If I go to add a number to the block they don’t show in the list. The box for unknown calls is checked. These are not internet calls. My subscription runs out soon and I will not renew if this is not resolved. Norton mobile 3.0 droid RAZR maxx HD android KitKat 4.4.2