The xsm is a flagship phone released by Apple in 2018. As the second generation flagship product of Apple's full screen era, it is also the first generation of Apple's large-screen top flagship phone. Compared with x, the memory has been upgraded to 4GB, an increase of 1GB, and it runs more smoothly. 64 gigabytes of memory is relatively small, and you can choose a 256 gigabyte version. Compared to the newly released Apple 14, the memory is the same, enough