comScore, Inc., a leader in measuring the digital world, released data from the comScore MobiLens service, reporting key trends in the U.S. mobile phone industry over the three month period between September and December 2009. The report ranked the leading mobile original equipment manufacturers (OEMs) and smartphone operating system (OS) platforms in the U.S. according to their share of current mobile subscribers age 13 and older, as well as the most popular forms of content and activity accessed via mobile device. The report found Motorola to be the top handset manufacturer with 23.5 percent market share, while RIM led among smartphone platforms with 41.6 percent market share.