Second major label to back service.

Warner Music Group has signed on with Motorola’s fledgling iRadio, a service that allows subscribers to access over 400 channels of commercial free music and talk programming from their cell phone. WMG is now the second major label on board, joining Universal Music Group, which signed a deal in October.

iRadio, which will be available in the first quarter of 2006, will cost subscribers roughly $7.00 a month. Motorola phones are used by Verizon, Cingular, T-Mobile, Nextel and Sprint customers.

Like the Universal deal before it, Warner’s agreement will allow iRadio to create genre and artist specific channels using the company’s vast catalog.

"This innovative and unique music service is another example of how the digital music experience for consumers continues to expand and improve,” Warner senior VP of digital strategy and business development Michael Nash said in a release. “Portable music devices are essential to consumers and we're pleased to see the demand for personalized mobile music services like iRadio continue to grow. Warner Music Group is committed to making its vast music library and world-renowned artists available to music fans on as many devices and over as many platforms as possible."

Because the service uses Bluetooth wireless technology, a subscriber can use the cell phone to download about 70 hours of iRadio content to play back on a home or car stereo, or through wireless headphones.

As previously reported, Clear Channel has agreed to provide 75 channels of commercial free music and some content from its syndication company, Premiere Radio Networks, including morning hosts Bob & Tom and the overnight show Coast to Coast AM.