With the holiday shopping season fast approaching, wireless carriers likely will unleash a slew of new handsets. However, some subscribers are still dearly attached to phones that have been on the market for months, if not years. The following is a countdown of the top 10 most satisfying cell phones in the United States in August, according to research firm comScore. This information derives from the average of a three-month rolling survey ending in August of U.S. mobile subscribers over the age of 13. ComScore asked respondents to rank their satisfaction with their device on a scale of 1 to 10, with 10 being the highest. Although various versions of Apple's (NASDAQ:AAPL) iPhone are on the list, the top spot may surprise you. Special report