After installing the latest iOS 17 v3 update on my iPhone 12 Pro, the setup assistant appeared. I chose my Wi-Fi network and then an error appears that "Verification Failed: There was a problem connecting to the server." It then just stays on that screen.
I was about to DFU restore my device - as removing Find my iPhone, trying on Cellular, and restarting didn't work. But luckily, I had Siri enabled!
The FIX: Use Siri (holding down the power button for 1 second) from the post-update intro screen and ask it turn on AirPlane Mode. Once Airplane Mode was on, it let me skip the connect to Wifi section and I was in - as cellular was also disabled!
No DFU needed!