Wifi issue with iphone 18 pro and 18 pro max

Yesterday we received 3 iphone 18 pro and 1 iphone 18 pro max at work. At home, all of them are connected to our wifi's without any issue, but today, we are not able to connect to any of our corporate wifi's. It get's connected but no internet. IP shows 169. instead of normal 192.168 as the rest of devices. I've checked SonicWall but it's working fine as always. Yesterday I've had my iPhone 11 pro connected as usual. This issue seems only with the new devices.

Posted on Sep 22, 2026 1:22 AM

1 reply

WheelieNick

Level 9 (74,110 points)

Sep 22, 2026 1:24 AM in response to Jfernandez237

An IP address starting with 169.254.x.x means the iPhone is using APIPA (Automatic Private IP Addressing), indicating that the device is connected to the Wi-Fi radio frequency, but failing to receive a DHCP lease from your SonicWall corporate network.

Please try this

check SonicWall DHCP Scope & Lease Limits: Even if the SonicWall "looks fine," adding 4 brand new devices simultaneously might have exhausted the active dynamic DHCP lease pool, or the SonicWall security/MAC-filtering services (like Capture Client, DPI-SSL, or Access Rules) are blocking the unknown hardware fingerprint of the new iPhone 18 series.

Forget and Rejoin Network: On the new iPhones, go to Settings > Wi-Fi, tap the "i" next to the corporate SSID, select "Forget This Network", and reconnect.

Toggle Private Address / Reset Network Settings: If it persists, perform a network reset on the affected iPhones via Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings.