Just two months after launching a program for its subscribers to stream music on its network without counting the data usage against them, T-Mobile has served up 7,000 terabytes of audio. That’s a lot of tunes from the various supported music services. Now the carrier is doubling the services its subscribers can use without hitting their LTE limits by adding AccuRadio, Black Planet, Grooveshark, Radio Paradise, Rdio and Songza to the Music Freedom initiative. A customer poll indicated subscribers want Google Play Music added to the list, which T-Mobile says it will do later this year. The new music services join iHeartRadio, iTunesRadio, Pandora, Rhapsody, Samsung Milk, Slacker and Spotify in the program.