Companies such as Amazon and Google currently use similar technologies to identifyuser behavior and then offer suggestions or products that might interest users.
According to the claims, hearing aids worn by at least two users will work in tandem with a personal computing device to identifyuser identities, establish a communication link and then swap profiles -- not a list of likes and dislikes, but dynamic audio settings.
While some carriers still use phone numbers to identify specific user devices or accounts, Apple has abandoned them in favor of unique device IDs (UDIDs).