How to Update / Upgrade iPhone to iOS Latest version
Periodically Apple regularly releases updates for iOS, the platform that became the basis of the iPhone, iPad, and iPod Touch. Well for you iPhone users, especially those who are new to have (who have long used it, would already know yeeesss... ^^), here is how to update / upgrade iPhone to iOS latest version.
First make sure your battery is above 50%, or else you can charge your iphone directly. After that go to Settings > General > Software Update.
If there is detail update, just click Download and Install. However, before the update process runs, you will be prompted to enter the passcode of your iphone.
After that click Agree and download the update process will take place. Wait, and hit the Install Now menu. The update process will take place. Wait for the process to finish.
When done, check again Settings > General > Software Update, and make sure the update is installed properly.
That's how I update / upgrade iPhone to iOS latest version. May be useful.