Beginning today, Verizon Wireless customers will be able to download as much music to their phones as they want for $15 a month via the operator’s new Rhapsody‘s subscription music service.

Rhapsody is a joint venture of RealNetworks and MTV Networks.

The service will work with the LG Decoy and LG Dare, the Motorola W755, Samsung SCH-u550, Glyde and Juke. Later in July, Verizon Wireless plans to launch the Chocolate 3 from LG, which will serve as the premiere Rhapsody device.

Verizon Wireless will provide free software upgrades to customers owning the Motorola RIZR Z6tv, Motorola RAZR² V9m or the LG VX8700.

In a related announcement, Rhapsody plans to eliminate copyright protection on all tracks that are purchased from its online music store. Beginning Monday, customers can buy music in the MP3 format, which will play on practically any music gadget, including iPods.