An ad statement by T-Mobile that it offers 50% more bandwidth than AT&T is based on "flawed" analysis and should be removed, according to the National Advertising Division. The NAD also took issue with some "call quality" claims, as well as boasts of "faster" 4G. T-Mobile Chief Marketing Officer Mike Sievert said that "NAD's findings are a validation of our marketing approach ... [and] won't result in any substantial changes to our marketing claims."

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