The
legal text for this license has this to say:
You may not exercise any of the rights granted to You in Section 3 above in any manner that is primarily intended for or directed toward commercial advantage or private monetary compensation. The exchange of the Work for other copyrighted works by means of digital file-sharing or otherwise shall not be considered to be intended for or directed toward commercial advantage or private monetary compensation, provided there is no payment of any monetary compensation in connection with the exchange of copyrighted works.
So if people do not need to pay money ("commercial advantage or private monetary compensation") to hear the work as you are distributing it, then you should be in the clear. Is your phone service an open-to-general-public-usage kind of thing?