America Movil's U.S. prepaid carrier TracFone has continually scaled back its ad spending over the past few years: from $70 million on measured media in 2005 to $30 million in 2007. Now a report in AdWeek claims that the carrier is looking to slash its marketing budget even more by dropping all network and cable TV in favor of in-store TV advertising at Wal-Mart and Target. The carrier is also looking into Web-based video ads.

For more on TracFone's ad spending:
- read this article from AdWeek