Even if the iPhone may be doing well as a rule, flaws in the iPhone 4's antenna design may be having a noticeable effect on sales, suggests Piper Jaffray analyst Gene Munster. The firm recently interviewed 258 people in Minneapolis on the topic, of whom 69 percent were aware of a quality issue. Of that group, 20 percent -- or 35 people -- said the problem swayed their decision on buying an iPhone 4.
