What is the function of Find My iPhone?

Find My iPhone serves the primary function of locating lost or stolen iOS devices. When activated, this feature uses GPS, Wi-Fi, and cellular network triangulation to help users track their devices on a map. If the device is lost, users can not only see its last known location but also activate a sound to help find it if it's nearby. Additionally, users have the option to remotely lock the device or erase its data to protect personal information in case of theft. This capability is crucial for enhancing the security of Apple devices and providing peace of mind to users regarding the safety of their information and belongings. The other options do not accurately describe the specific purpose of Find My iPhone.