HII FRIENDS I ALSO USE IPHONE 5S. SOFTWER WHICH IS USE IN THIS PHONE IS VERY NICE NOW DAYS NEW SOFTWARE IS 11.2.1 IPHONEl HAS SIRI SOFTWARE WHICH USEFULL TO FIND SOMETHING TO KNOW SOMETHING SIRI ALWAYS ANSWER BEST SOMETIME SIRI ALSO HELP TO MAKE BEST DISH BY GIVE BEST IDEA.BETTRY LIFE IS TOO LONG AND RESULT OF CAMERA ARE ALSO VERY CLEAR I LOVE THIS PHONE BUT YES IPHONE IS COSTLY .