Accessibility of bluetooth on mobile phones is a user’s choice, but almost always those who are using a headset, or a navigation system, leave the bluetooth on, making it reachable by any message. So many users are reached in this way.
Moreover, we can state that in covered area, the penetration rate of all the people passing go from 2 to 8% (depending on whether there are waiting areas, areas that create queues, road crossings or traffic lights, etc…), this means that in a high traffic area, we will not catch those who have an iPhone or those who are not active and visible the bluetooth, but we can still reach hundreds and hundreds of users.
The Bluetooth technology can always be considered an added value, because all those we reach are people who read the request, and decide to accept it, then focus their attention on what they are to see.