After Samsung acquired mSpot in 2012, they revamped the music locker service and released it as Music Hub on the Galaxy S III. Up to this point, Music Hub has been exclusive to the Galaxy S III and the Galaxy Note II, but Samsung is reportedly planning to release the application to more devices, as well as to devices outside of the US. Older Samsung devices will get the honors of being first in line, and other non-Samsung devices will receive it afterwards. No word on exactly when this is happening, but with the success Samsung is having, I can’t imagine it’s going to take too much longer.
source: Sammy Hub