After October 15, 2008, Sprint customers will no longer be able to download songs to their PC from the Sprint Music Store. Right now if you purchase a song over-the-air from the Sprint Music Store to your mobile handset, a copy of that song can be downloaded to your PC as well--both copies are available for one payment of 99 cents. You will have until October 14 if you want Sprint Music tracks downloaded to your PC. You can still backup the over-the-air songs on the PC, but the tracks will only play back on the handset that made the purchase.
Verizon Wireless currently offers the same two-song download via V Cast Music but the songs are $1.99 each.