How to Update iPhone OS 4

It is easy to update your iPhone OS firmware to the latest iOS 4 on iPhone 3G, 3Gs, and iPhone 4. Here is how you do it.

iOS 4 for iPhone 3G, 3Gs and 4

Most people mistake the fact that iOS can be installed onto all genuine iPhones from the 3G version till the most recent one. But that is misconception. Unless jailbreak has occurred, the iOS is native and comes pre-packed in every iPhone. It can be however outdated and that would need an update. Today’s latest version of iOS is iOS 4. In order to upgrade your smartphone to iOS 4 then follow the steps outlined below.

First of all download iTunes 9.2 from a certified link.

Second, backup your device in iTunes by syncing it to a Windows or similar platform.

Third, Download the genuine iOS4 Firmware from some links you can get from certified sources. Use Firefox browser for the download as it downloads .ipsw files correctly without splitting it up.

Fourth, in iTunes window press and hold the Option or Shift key and then click on restore. Afterwards choose the .ipsw file from your files. Choose a system download location in Documents, Downloads or Desktop.

After that, iTunes will restore firmware to iOS4!

iPhone iOS 4 Software update

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