My iphone froze when updating
Before downloading a software update, users should also be sure their i Phones or i Pads are backed up to i Cloud.
If they have to restore the devices, they'll be able to recover all of their photos and other items.
If the website opens just fine, your network is good and the app being stuck at Loading/Waiting is caused due to some other issue.
But if the website doesn’t open and Safari throws an error, there could be two possibilities: the network is down or the connection is slow. If both these things do not fix your issue, it could be a problem at Apple’s end.
"We experienced a brief issue with the software update process, affecting a small number of users during the first hour of availability," Apple said in a statement.
Connecting it to the computer brought up another error window that said, "There is a problem with the i Phone 'i Phone' that requires it to be updated or restored." The message indicated you might have been able to fix the problem by updating your phone, but if the update didn't work, you might have had to restore your phone to factory settings, which erases all content and settings.
Eventually, I was able to update to i OS 10 through i Tunes.
Three hours after I started downloading i OS 10, I finally had it loaded on my i Phone 6S.
Has your i Phone even been stuck on verifying update when updating to i OS 11, 11.1 or 11.2?
If so, read this post and get well informed what is verifying updating and how to fix i Phone stuck on verifying update in i OS 11.