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How can I find if the OS on my iPhone is up to date?

Starting with version 5 of iOS, you can easily update the operating system software on the iPhone, iPod touch, and iPad wirelessly and over the air. In effect, the umbilical cord has been cut from the PC or Mac.

But older phones such as the iPhone 3G or the original Phone cannot install iOS version 5. For example my 3G phone is up to date at the latest possible version for it – iOS 4.3.1. But on my 4S, the current and updated version is iOS 5.1. So how can I tell if the software is up to date and if I have the latest fixes and patches?

It is very easy.

  1. Launch the Settings App.
  2. Scroll down to General and tap on it.
  3. Tap on Software Update.
If the software is up to date, you will see that notice. If not it will give you the option to download the latest update.