Seriously? Meta uses many methods to snoop on the cell phone and with its functions it also looks for devices in the network in which you are logged in and also devices simply in the vicinity. It goes without saying that Meta makes use of open data… I would even go so far as to say that other AI models are not trained any differently. Well, they may be trained using an AI that has been trained on them so that they don’t have to access the data from the actual sources themselves.