baloofarsan on 17 June 2016
Some people think that going the "smartphone way" is going to make generations go away. Everything will share the same OS.
The latest iOS (9.3.2) is compatible back to iPhone4S. That is four and a half year. Apparently it has problems working with the oldest iPhone.
https://en.m.wikipedia.org/wiki/IOS_9
The new iOS10 coming this fall will drop compatibility with iPhone 4S!
