iOS 8 released for iPhone 4S, iPhone 5, 5S, 5C, iPhone 6, 6 Plus, iPad Air, 4, 3, 2 and iPod Touch 5 Gen. We know that millions iPhone owners installed new iOS 8 for free. How do we know and what does it mean? It's mean, that iOS 8 doesn't work on iPhone 4. If you find download links like iOS 8 ipsw for iPhone 4, you must know - it's scam or virus, because Apple unsupported iPhone 4 in iOS 8. Yes. It's true. If you have this smartphone's model, you can't install new iOS.
How Do I install iOS 8 iPhone 4?
Nothing. You can't. Don't forget, iOS 7 is very cool iOS for iPhone 4. iPhone 4 works perfect on iOS 7!!! If you have iPhone 4S - you can download and install last version from here.