With private Wi-Fi addresses, the device will now provide a different MAC address for each network. It will save and create a network to keep track of frequently visited places. If you move around the city, connect to different public Wifi such as cafes, airports, libraries. You can change the MAC address manually on some devices. Every network you connect to gets the same MAC address.

Traditionally, the MAC address will be set according to the hardware level and will remain the same for the rest of the device's life. This will help identify the device in the network.

When an iPhone or any other device connects to a Wi-Fi network, it sends out a media access control (MAC) address.