In what order would an iPhone automatically join a Wi-Fi network?

The order in which an iPhone automatically joins Wi-Fi networks is determined by the prioritization of network types. Preferred networks take precedence as they are already saved in the device's settings and are explicitly chosen by the user for reliable connectivity. Following preferred networks are private networks, which typically require credentials to connect and are considered secure, meaning the device will also prioritize these over less secure public networks. Public networks, while accessible, often lack the same level of security and are therefore connected last in the lineup.

This hierarchy ensures that the iPhone first tries to establish a connection to networks that offer both preferred access and stronger security, optimizing user experience by ensuring reliable and secure connectivity before resorting to any available public options, which might be less reliable or secure.