At the moment iphone 6 runs ios 8.1.3
The iPhone 5 will run iOS 6 or iOS 7.
Probably not. The only OS for iPhone currently in beta is iOS 6. There are is no iOS 5.1.2 currently in beta and iOS 6 should be out within a few weeks. Unless a security hole in the current iPhone OS is found before 6 is released, don't expect an update to iOS 5.
Considering updating your iPhone forces you to update to the latest software available for the device, updating an iPhone 3GS now will update it to iOS 6.
There is no iPhone 6. The iOS can be downloaded to earlier handsets, yes.
No, itunes supports it.
P0sixninja sells iPhone 5 and iOS 6 jailbreak exploits to an Apple employee
Currently, as of 4/22/2013, the latest version is the iPhone 5 and latest iOS is iOS 6. The newest technology would be a bigger screen and faster processor, regardless.
iOS 6 will feature a new app called passbook on the new iPhone.
Yes they do but remember to upgrade to the latest iOS version 6
It runs Apple's iOS mobile operating system. The first generation iPhone was released on June 29, 2007; the most recent iPhone models are the iPhone 6 and iPhone 6 Plus, which were unveiled at a special event onSeptember 9, 2014.
There is no iPhone 3. You may be referring to the iPhone 3G or 3GS, which are the 2nd and 3rd generation iPhones respectively. Out of these two, only the 3GS can run iOS 6, while the 3G is stuck on iOS 4.2.1