If you have important data on your i Phone, you're suggested to back them up first.
According to ZDNet, it includes "optimization for solid state storage, strong encryption, better file time stamping (down to the nanosecond), and many storage saving improvements."It's unlikely anything will go wrong, given that beta testers have been putting i OS 10 through its paces for months -- but better safe than sorry.
A “Software Update Failed” popup will appear followed by a message that says “An error occurred downloading i OS 10.3.2”.
If you face this problem, luckily we have a couple of solutions to fix it.
When a new i OS firmware is released to the public, millions of i OS users are trying to download and install it right away.
The huge amount of traffic on Apple servers means that it will sometimes fail to keep up with some of the requests.
Nearly a month and a half after i OS 10.3.1 rolled out to the public, Apple has now officially released i OS 10.3.2 on i Phone, i Pad and i Pod touch.