[Black69ta]

You are Both right and Both Wrong..

Market Share is relative only to the period mentioned and only to units sold.
User Base would refer to all units in use that sold during the period and previous, WinMo would easily have the user base and iPhone may have have market share, although I can't see how one phone by one manufacturer by one carrier can outsell multiple WinMo "PHONES" from multiple manufacturers, thru multiple carriers, in any single month or cumulatively.