7:06 P iOS 12.4.9: iPhone 5s, iPhone 6 a 6 Plus, iPad Air, iPad mini 2 a 3, iPod touch (6. If you have a different iOS device running 7.1.2, see what Demo wrote. Go to Settings>General>Software Update and see if the update is showing. Here's the full list of compatible devices iOS 9.3.4 will surely be the final iOS 9 update - and you need it no Yes you can update from iOS 7.1,2 to iOS 9.0.2. Though I wouldn't because it's just going to run horriblely. The answer is iOS 7.1.2 Originally Answered: Can the iPhone 4 install iOS 9? No it can not but the iPhone 4s can if that's what u meant. What is the Latest iOS Version for iPhone 4? Now the question is which latest iOS can be installed on iPhone 4. Also, you cannot force iOS 8 on iPhone 4 as it is futile. Apple has not released a version of iOS later than 7.1.2 that is physically compatible with an iPhone 4- that being said, there is no way for you to manually upgrade your phone- and for good reason Don't forget that Apple has full software support of its devices and you cannot update iPhone 4 to iOS 8 or iOS 9 by anyway. The iPhone 4 does not support iOS 8, iOS 9, and will not support iOS 10. Home Iphone 4 ios 9 How To Install Ios 9 On Iphone 4? - OS Toda