Supported models for iOS 8
Apple’s latest iOS which is known as iOS8 is revolutionizing the apple devices. It is going to come up with multi functions. Only supported device will be able to download latest iOS from apple.
Here is a list of supported models for iOS8
iPhone 6 Plus
iPod touch 5th generation
iPhone with Retina Display
iPad mini with Retina Display
Unfortunately, iPhone 4 and previous models won’t be supported for iOS8. They will need to stay in iOS7.