hi...im not an expert...but this is what had happened to me...i didnt face any probs...the first time i tried to install a s/w, i automatically got a prompt to upgrade the s/w version of the OS...when u go in application...go to Update..check if there is an update for the OS there...if its there..ur OS has NOT been updated...pls do the update directly on the phone..its easiest and convinient...if u do have an internet connection on the phone..also....i first updated it...when halfway through...i THOUGHT the process was complete..but it wasnt...info about the OS still showed the old s/w version in Settings...so you can check here too...just try it..and see what happens...good luck!!!