Smartphones can provide services based on consumers’ location, raising potential privacy risks if companies use or share location data without consumers’ knowledge. The Federal Trade Commission (FTC) enforces prohibitions against unfair and deceptive practices, and the National Telecommunications and Information Administration (NTIA) sets national telecommunications policy. This book addresses how mobile industry companies collect location data, why they use and share these data, and how this affects consumers. Also discussed are the types of actions private sector entities have taken to protect consumers’ privacy and ensure security of location data.