In fact, as I had mentioned in my i OS 9 review, stock apps like Mail and Safari feel more responsive in i OS 9 probably because they are now able to use Metal, Apple’s low-level, low-overhead hardware-accelerated graphics API.
When you have i Tunes open, connect your i Phone to your computer using its USB cable.
(You may see your computer automatically installing the necessary drivers; if so, let this run.) Once all the necessary drivers are installed, i Tunes will recognize your i Phone.
Apple delivers its i Phone software updates through i Tunes, so the first thing you should do is make sure you have the most recent version of i Tunes running on your computer.
To update i Tunes, go to the "Help" menu, and select "Check for updates." If i Tunes says you have the most recent version, you're all set to move on to Step Two.
The same error is occurring even when trying to sync the i Phone with i Tunes.