I have recently purchased Sony Xperia U and I liked the phone but have some confusion with the memory. When I saw the details of the memory i found that there are three types of memory available in this device. These are internal storage, phone memory and SD card. I am confused between internal storage and phone memory. For me, these two sounds the same but if these are coming separately then there must be some difference between these two. Can somebody over here post with the difference between internal storage and phone memory?