During the first quarter of 2006, Telephia reported that during an extensive nationwide test of major wireless carriers in 350 metropolitan markets around the country, Cingular dropped the fewest number of calls across the country. Cingular in turn began aggressively advertising the "Allover Network," citing Telephia as "the leading independent research company." Telephia's report was in stark contrast to the Consumers Union publication, Consumer Reports, based on a survey of 50,000 of its members in 18 cities, which criticized Cingular for static and dropped calls.[17] Furthermore, J.D. Power and Associates consistently ranked Cingular at or near the bottom of every geographical region in its 2006 Wireless Call Quality Study, which is based on a smaller survey of 23,000 wireless users.
Telephia, which tests wireless networks by making over 6 million calls per year in what it claims is the world's largest wireless network test program, initially refused to provide details on its study, and a spokesman for the company has said, according to the Boston Globe, that "Cingular shouldn't have even mentioned the company's name to a reporter."[18] The research company later stated that Cingular did indeed have a "statistically-significant lower dropped-call rate than the competition across some market/time period groupings," but that Telephia had "no knowledge of the specific methodology (markets, time periods or statistical thresholds) that Cingular used for its 'lowest dropped call' claim."[19] AT&T Wireless does not advertise this 'advantage' any more, as of August 2007. The company has pulled all related material.