I'm unclear on how a BLE Beacon and device architecture works.As I understand, there's two types of Bluetooth: a classic version which has relatively high battery consumption (I imagine this being the one the user turns on to pair a device, for example), and a Low Energy version (BLE) used for receiving small signals.If I haven't gone too far off base yet, my question is:  Does a user have to have bluetooth turned on on their phone in order for the phone to receive a beacon signal?I'm unsure if when someone turns on bluetooth they're enabling only that one type of bluetooth.  It would seem practical that this type of bluetooth not be required to receive a BLE signal (else the usability of beacons would rely on bluetooth being turned on, which I can't imagine would be very effective).Here's what I envision this would work like:User installs app and opts in to location servicesUser enters proximity, with or without bluetooth turned onDevice receives beacon BLE signal, says oh hey, I'm supposed to handle thatDevice starts or opens app and pushes the proximity notification to the app.I'm not sure I'm exactly clear on describing the type of bluetooth being on I'm thinking of but hopefully the question makes enough sense.  Thanks
Bluetooth on to receive Beacon signal?
mobile;geolocation
Reading few articles about fencing by Beacons, we come to the conclusion that the Bluetooth still need to be on. As on as the GPS or Wifi need to be for geolocation. Despite the very low batery consumption, I assume that should be still possible for any user to swtich it off for privacy reasons. In some countries, tracking someone's location or activity  might result in a breach of privacy.In the line with these arguments, customers might decide to don't consume whatever is being sold via fencing (ads, new services, etc...). So whether via app or OS, should be still possible to switch off this  communication channel.In any case, this should not be a reason for dismissing fencing. Fencing has been proven to be a profitable marketing strategy.Something I find important and worth a mention is the device compatibility with BLE. Devices need to be built with the proper BLE receivers to make this work, because BLE it's not backward compatible with BL 4.0. Probably most of the new devices are compatible, but given the actual market segmentation, would be hard to say how many potential consumers would be excluded.