We have been wondering exactly what T-Mobile’s involvement in the Google Music announcements would be, and we now have the answer. Honoring the longstanding relationship between Android and the wireless provider, T-Mobile subscribers will have the ability to bill music purchases directly to their accounts. T-Mobile customers will also get extra incentives in the form of exclusive music and free tracks from the likes of Drake and Maroon 5. Details on when and how subscribers can begin adding music to their monthly bill were not revealed, but the option will be available shortly.