Nielsen recently reported data from a smartphone market share study conducted in Novemeber 2010 that shows Android beginning to catch up to the iPhone. While iPhone is retaining it’s top position in overall U.S. smartphone market share, the Android platform came close with 25.8% of the share. These numbers are up for Android by 6% from another Nielsen survey conducted October 2010. The survey also examined purchase of smartphones in the last six months and found Android based phones to be on top, making up almost 40% of purchases in the U.S.