iOS 10 downloaded but won't install
I downloaded iOS 10.3 but when I install it it just says verifying update then says update failed after a while. I tried updating using my computer but itunes says my phone is already up to date at iOS 9.3 (which is obviously not up to date). What must I do? I have a GB of space available even AFTER the update has been downloaded so I don't think space is an issue.
iPhone 6, iOS 9.3.2