Tier 3 operator Cleartalk has deployed a CDMA network using Nortel Networks gear in the AWS spectrum in the Amarillo and Lubbock, Texas, markets. 

Cleartalk, which does business as Flat Wireless, offers flat-rate unlimited voice calling, text messaging and Web surfing.

For more:
-See this press release [1]

Related article:
ClearTalk [2] taps ZTE for 3G