Final answer:
Indoor positioning systems don't include the ability to remotely activate a phone's microphone and camera. Such functionality pertains to hacking or specialized surveillance tools, not to standard features of indoor positioning systems.
Step-by-step explanation:
According to the Smart Retain video case, indoor positioning systems were not used to remotely activate a phone's microphone and camera. While these systems have been employed for various tracking and location-based services, such as tracking pedestrians and cyclists, enabling facial recognition for identification purposes, and allowing connection to devices like a Stingray for local law enforcement tracking, the ability to covertly activate a phone's microphone and camera is distinct and is not a function of indoor positioning systems. This type of surveillance capability is associated with hacking or law enforcement surveillance tools, not standard indoor positioning technology.