IPhone 4s has been my first iDevice and I had a great experience with it. Its very easy to use and durable. At the time of buying it came with iOS 6 and the best part is in 2016 too the phone is software upgrade supported, currently running on iOS 9.
The phone runs smooth and is great for business or day to day use. Comes with replaceable warranty and can be a great buy for the price point. Currently available at a far lower price than quoted above. Its highly recommended! ????