iOS 7 is
Apple latest stable version of their operating system used for iPhone,
iPad, MAC OS Lion and other gadget devices developed and invented by Apple corporation of United States released with the latest
iPhone 5S and
iPhone 5C. If you owned the iPhone of earlier model then iPhone 5S and 5C, then you have to update your iPhone from your iPhone's Settings > General > Software Update. The update file of iOS for iPhone is 1 GB in size and it will take enough time to updating depending on your Internet connection speed.
If you want to choose the other alternate option to Update iPhone with iOS7, then you can this by mannully download the latest iOS 7 from Apple's website and then install it in your iPhone. It is also to remember here that iOS7 supports iPod 5th generation and above, iPhone 4 and above, iPad 2 and above and iPad Mini.
You can download the iOS7 for iPhone 4 from
here, this file contains the 1.23GB of data, so be careful to download it fully on reliable Internet connection. Download iOS7 for iPhone 5 from
this link
