I happen to watch some YouTube videos of some people trying to update from iOS 9.0 to the more recent versions and their iPhones froze when they clicked slide to upgrade after they re-started and etc. I can't remember if they had anything less than an iPhone 6s, however I still have iOS 9.0 on my 6s because I have not had a reason to update it yet, at least until iOS 10 is released. So will I have that same problem of my 6s freezing when I click slide to upgrade or will I be ok? Also I should add any upgrade I eventually do would be over Wi-Fi if that makes a difference.