Both Apple's iPhone and iPad continue to remain popular with U.S. teenagers, according to Piper Jaffray analyst Gene Munster's latest semiannual teen survey. 55 percent of teens now own an iPhone, compared to just 48 percent from a survey conducted in April and 40 percent in the fall of 2012.Our most recent semi-annual Teen survey demonstrates that Apple remains the most popular tech brand amongst teens. As of Fall 2013, the iPhone represented nearly 55% all phones used by teens and the iPad family remained at close to 70% share of tablet ownership. We believe that while Samsung seemingly had some momentum with teens over the past year, Apple's brand and product quality has enabled it to remain the top choice for teen consumer electronics.W