Dear Apple Support Team,
I hope this message finds you well.
I am writing to report an issue I have encountered with Wi-Fi connectivity on my iPhone 16 series running iOS 18.0. The problem occurs as follows:
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When attempting to connect my iPhone 16 series (iOS 18.0) to a Wi-Fi network, the connection always fails.
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After this failed attempt, any other iPhone (not from the 16 series) running iOS 18.0 also fails to connect to the same Wi-Fi network.
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However, if I restart the Wi-Fi router, the non-iPhone 16 series devices can successfully connect to the Wi-Fi network.
To further investigate, I used Wireshark to monitor the network traffic. I observed that the iPhone sends a DHCP Discover message, but the Wi-Fi router does not respond with a DHCP Offer message.
Based on these observations, it appears that the issue is triggered by the iPhone 16 series running iOS 18.0, which causes the Wi-Fi router to malfunction and prevents other devices from connecting.
Additionally, I have tried all the steps listed on the following site, but the issue persists: https://support.apple.com/en-us/111786
Could you please investigate this issue and provide guidance on how to resolve it? If this is a known bug, is there a planned update to address it?
Thank you for your assistance. I look forward to your prompt response.
Best regards,
WJohn
