This prevents the network from identifying your phone and helps keep maintain privacy. With that, your iPhone uses a random MAC address when it connects to a Wi-Fi network. To combat that, Apple offers a Private Address feature on iPhones. For example, if a company has multiple wireless hotspots around the city, and you connect to multiple of those hotspots, that company knows that it was you who visited multiple of their locations.
Since your iPhone has a unique MAC address, wireless networks can use this address to uniquely identify you and trace your locations. RELATED: Why You Shouldn’t Use MAC Address Filtering On Your Wi-Fi Router Apple’s Privacy Options for MAC Addresses This allows you to decide what bandwidth to give your specific device based on its MAC address, and whether to allow or disallow it from connecting to your network. For example, you might use it for MAC filtering (though we don’t necessarily recommend it). You can now use this address however you want.
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