Prepaid wireless carrier Cricket Communications Inc. has expanded its new over-the-air music downloading service to Chicago and 12 other markets, offering unlimited downloads as part of a $55 monthly plan.

The company, which is owned by San Diego, Calif.-based Leap Wireless International, Inc., launched its Muve Music service in Las Vegas last month. Cricket said its service includes the entire catalogs from Universal Music Group, Warner Music Group, Sony Music Entertainment and EMI Music, as well as music from independent label IODA.

Cricket’s music rate plan costs $55 month and includes unlimited nationwide calling, texting, mobile Web and e-mail, as well as unlimited downloads of full tracks, ringtones and ringback tones. The carrier does not require contracts or credit checks.

For now, the Muve Music service is only available on the Samsung Suede, a new phone that costs $199. In Chicago and the other launch markets, the phone will be sold for $99 after rebates.