If you recently bought an iPhone 4S, chances are you sold an older model iPhone to fund that purchase. You also probably stayed on your current carrier and purchased the lower capacity models. These trends are gleaned from a Consumer Intelligence Research Partners survey conducted in October, November and December of 2011. According to CIRP, 21 percent of iPhone 4S owners bought the 64 GB iPhone 4S, which means most 4S owners (79 percent) opted for the lower capacity.CIRP also found that 36 percent of 4S owners migrated from another platform, which is up from the 18 percent reported in earlier surveys. This increase is impressive and shows the 4S is gaining traction among Andr