Using Sprint Music Store songs on a different device?

[LotekJunky]

I've been searching but can't find anything on this. I'm sure someone else has come across it, but I need some help.

I have never used the sprint music store, don't need to, don't want to... but a few of my friends at work keep bringing me their new touch pros with the same issue. They have been using the Sprint Music Store on other phones and recently upgraded to the TP? I'm not familiar with the app and all of my searches only turn up information on the actual installation files, nothing specifically about the music files. Can those downloaded and purchased music files be played on a different phone or are they locked to the original device?