I have been using 4s( 8gb) for over an year now and honestly have faced issues from memory to app crashing. What I realised is, once you sarifice candy crush, candy cam basically anything that has candy and has above 100mb size, this ancient iphone is as smooth as an icecream. Also turning on the icloud facility would help greatly for the memory issue. As for now it lets me call, whatsapp, skype, instagram and take pictures, so I am satisfied with this cute thing. Cheers?