I need about 20GB free memory for the music, photos and videos that I currently want to keep on the phone. I don't want to pay $600 for the phone just to keep unlimited. Since I'm nearly always on wifi, I have never even used 1GB in any month. However, I'm rarely on wifi when listening to music, so I would have to use data. That would likely easily take me over the 2GB that I would have if I buy the X subsidized. If the X had a SD card slot I would probably have one already. Even 32GB memory (25GB free after I load my apps) would probably be acceptable, but a SD card slot would be better.