Starting with iOS 8 and significantly enhanced in later versions like iOS 14 and iOS 15, Apple introduced this technology to prevent tracking. When this setting is deactivated, the iPhone MAC address different on router observations will cease, and the router will log the permanent identifier assigned during manufacturing.
Fix iPhone MAC Address Router Mismatch
By constantly changing the identifier, it becomes significantly harder for third parties to track your device across different Wi-Fi networks, such as in public spaces or commercial venues. The router treats this randomized string as the official identity of the device for that specific session, which is why the iPhone MAC address different on router logs compared to the static identifier found in the Settings app under General > About.
The first is the "BSSID" or the actual router address. The phone will associate successfully with the network, but the router logs will show a different identifier than the one you expect.
Fix iPhone MAC Address Router Mismatch
For an iPhone, this value is specific to the Wi-Fi chip responsible for connecting to wireless access points. Verifying Your Connection Details.
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