Everyone has an opinion, and if they all stink, then Pew must have one hell of a tolerance for foul odors. The research group recently surveyed a number of mobile phone owners to determine their primary complaints, and while it's not much of a surprise, slow network performance stole the show. In all, 77 percent aired at least some dissatisfaction with download speeds, and nearly half of all respondents cited frequent frustration. The story is similar for dropped calls, as 72 percent of those surveyed claim to experience the annoyance at least occasionally. While less widespread, the distribution of those who receive unwanted marketing attempts via either telephone calls or text messages is roughly equal -- it seems reasonable to assume that many respondents are harassed by both means. For more surveys*, just text #eng-123 to 9999. *Outrageous fees will apply.