31 percent of U.S. mobile consumers plan on buying an Android-based smartphone in the next year. Nielsen found that 30 percent of respondents plan to get their hands on an iPhone in the next 12 months. RIM's BlackBerry smartphones and Windows Phone 7-based devices were desired by 11 percent and 6 percent of the respondents, respectively. Surprisingly, 20 percent of those surveyed are still unsure of which smartphone they want to buy.