(Telecompaper) The Federal Communications Commission has fined four US mobile operators for failing to protect consumer real-time location data. The FCC has proposed fine of over USD 91 million for T-Mobile US, over USD 57 million for AT&T, over USD 48 million for Verizon and more than USD 12 million for Sprint. The operators were also admonished for disclosing customer location information without authorisation to a third party.