Larry has a Samsung Galaxy S4, but it's time to upgrade, so he ordered a Nexus 6P with Google Fi. He doesn't like that he can't hide his number during outgoing calls unless he adds a few extra numbers each time. Leo says that may be carrier specific. Google Fi is an MVNO, using Sprint & T-Mobile plus Wi-Fi. So it's likely that it's hard to have a setting to block a number when it's moving from carrier to carrier. Larry will need to clarify with the carriers to see what they require.