Can't update iPhone 5S to the last iOS version (Verifying update) I am trying to install the latest iOS version (iOS 10.3.1) on my iPhone 5S. I've already downloaded it, I just need to install it. However, when tapping on "Install Now", it keeps saying "verifying update...", and so I cannot proceed further (I need to brutally reset my phone).

Can somebody help me fixing this issue?
Restore is sometimes needed from iTunes when an over the air (OTA) update fails you repeatedly. iTunes restores have a couple of other advantages in addition to being far more reliable:


chance to back up locally instead of iCloud
less free space needed on the device (you don't need space to stage the upgrade and contain a download all on the device - just space needed to apply the change)