I am using iphone 4s from long time
I have iphone 4s 64gb and I found it so good.
I recently update it to ios 9.3 and it is the last ios update for iphone 4s .
I found iphone 4s a user frendly product and a must to use phone
since I am using it from long time bt it never get hang althou I open as many application as I want but it never hang and thats the great thing from iphone.
battery backup is not wo good as I get 4 to 5 hr of battery backup but its a iphone so I can go with that .
as we know the latest release from iphone is iphone 7 but iphone 4s is also a good product
and the best thing I found in iphone 4s is SIRI a artificial intelligence which apple added from iphone 4s.
I found the iphone 4s good and love to use it.