What does 2012 have in store for Android, BlackBerry and iOS?

Research In Motion's decision last month to replace long-time co-CEOs Jim Balsillie and Mike Lazaridis with COO Thorsten Heins crystallized the challenges that remain for the BlackBerry maker. The company must push back against declining market share in the U.S. market, deliver its BlackBerry 10 platform on time and with perfect execution and convince consumers, carriers and developers alike that RIM is a company worth betting on. One of RIM's staunchest U.S. allies, AT&T Mobility, thinks RIM has a place at the smartphone table--but CMO David Christopher recently noted that RIM needs to "innovate quickly and execute." However, RIM isn't the only smartphone player facing serious issues in 2012. Here's what you can expect. Special Report