Fix stuck on “Verifying Update” on iPhone
To fix this issue please do not force reset your iPhone, if you are on the lock screen ask Siri to “Open [any app you want to]” because when the screen is stuck you can’t use the touch screen, once you open an app, make siri request again to “Turn off Wifi/Internet connection” this will fail the verifying process for update and you will get error notification and you will no longer be stuck! You can also make Siri then quickly scroll and turn off wifi manually. This should fix your problem and don’t forget to delete the update in storage then download again to fix any issues with it.
iPhone 15 Pro Max, iOS 18