Android now holds a major stake in the business that is U.S. smartphones. According to figures from the latest comScore MobiLens report, the Android platform has been found on more than half (51 percent) of all smartphones in the United States. The data, compiled from during the three month average period ending March 2012, was compiled from more than 30,000 U.S. mobile subscribers. Up 3.7 percent from the previous quarter, it’s the biggest gaining platform in comScore’s report.