Yes, it is technically untrue, but it's close enough to true that it shouldn't be big point of contention. In 2006 64million smartphones were sold. vs ~1billio

Yes, it is technically untrue, but it's close enough to true that it shouldn't be big point of contention. In 2006 64million smartphones were sold. vs ~1billion total cell phones. Given that dumbphones were not replaced nearly as often as smartphones, it's very easy to extrapolate that well under 5% of the phones in the world were smartphones.