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.
Once the i Tunes update has downloaded, it will begin installing itself automatically.
When the installation is complete, you may need to restart your computer in order to run the new version of i Tunes.
Once you restart your computer (if you had to restart it), open i Tunes again.
You'll have to review and accept the i Tunes Software License Agreement before the new version will launch.
The phone's name (which you gave it when you activated it) will appear under the "Devices" heading in the menu that runs on the left side of the i Tunes screen.i Tunes may begin backing up and syncing your i Phone automatically, depending on whether or not you've set it to sync automatically.
You'll see a pop-up message from i Tunes, notifying you that it is about to update your i Phone's software and that it will verify the update with Apple.
But don't worry: the process is pretty painless.
Here's a guide that explains exactly how to get the latest i OS software on your i Phone.
In the middle of the screen, you'll see a section called "Version." This tells you what version of i OS your i Phone is running.
If a newer version of the i OS is available, you'll see a button that says "Update." Click this to continue.