You will have to download the IOS 8 on the iPhone 5c. This is easy to install.
iphone 5c is better bcz it has the updated ios version and features
Now assuming you mean iOS 7, the iPhone 4, 4S and 5 will get it along with the two new iPhones coming out which are the iPhone 5C and 5S.
Yes, you can run iOS 7 on the iPhone 4.
The setting to make the screen flip on the iPhone 5 depends on what version of iOS you are using. If you are using iOS 7 or higher, simply swipe your screen up from the bottom and tap on the little lock icon.
iOS 8 is set to be released and will feature on iPod touch 5th generation, iPhone 5, iPhone 5c, iPhone 5s, as well as iPad 2.
Sadly, no. The latest version of the 3rd iPhone (iPhone 3GS) is iOS 6.1.5.
Since ios 7 is designed for the iphone 5, it will probably make the iphone 4 slower.
The iPhone 5 will run iOS 6 or iOS 7.
You can get Roblox on the iPhone 4, 4S, 5, 5C and 5S. Do note that iOS 5 and above must be installed on your iPhone - or else you cannot download Roblox.
You can update the following Apple products to iOS 7 legally:iPhone 4iPhone 4SiPhone 5iPod touch (5th generation)iPad 2new iPad (3rd generation iPad)iPad with Retina display (4th gen)iOS 7 is already preinstalled on all of these devices if you have not purchased one yet. The iPhone 5S and 5C must run iOS 7.
Yes you can, but expect some iOS functionalities that are on, say the iPhone 5S won't carry over to the iPhone 4.