I currently have iPhone 5 with iOS 10. It is six times faster than iPhon 4s in iOS 8/9
However. My iPhone 5 is still fast but i'm just tired of it and want to upgrade to a newer one
Is iPhone 5s gonna get more OS updates like iOS 11 and iOS 12?
iPhone 6/6S and iPhone SE i know they are faster but they are so expensive doubling the price of an iPhone 5s.
Read more: Is iPhon 5s still worth buying in 2017?