U.S. smart­phone plat­form mar­ket share com­par­ing the three month aver­age end­ing February 2012 ver­sus the three month aver­age end­ing November 2011 accord­ing to com­Score:

• Google: 46.9% → 50.1%, +3.2% points
• Apple: 28.7% → 30.2%, +1.5
• RIM: 16.6% → 13.4%, -3.2
• Microsoft: 5.2% → 3.9%, -1.3
• Symbian: 1.5% → 1.5%, 0.0

Despite all the efforts by Microsoft its share of the U.S. smart­phone mar­ket keeps falling. Short of giv­ing away Nokia Lumia smart­phones I don’t see how Microsoft will gain share. Unfortunately, I expect rapid mar­ket share losses to con­tinue at RIM.