I restarted the iPhone, plugged in the lightning to supply the power, and started the upgrade from iOS 12.4 (I think it was) to 13.
It is stuck at the Apple logo screen with the horizontal bar, with the bar showing what is like 99%, and it has been like that for 1.5 hours now. What can be done?
P.S. To see what might be able to fix it. Please see my answer for the possibilities. Unfortunately, I waited for iOS 13.1, 13.1.1, and 13.1.2, and none could fix it.
Best Answer
You may want to read If you can't update or restore your iPhone, iPad, or iPod touch on Apple's website. Essentially, You have two main options.
1. Force restart your iPhone
In other words, force your iPhone to reboot. How you do this will depend on your model of iPhone. Since you haven't specified this, refer to Force restart iPhone on Apple's website.
2. Put your iPhone into Recovery Mode
If you have an iPhone 8 or X follow these steps:
If you have an iPhone 7 follow these steps:
If you have an iPhone 6S follow these steps: