Smartphones passed 50% of all mobile phones sold on earth some time in the last month or two. With that in mind, talking about 'smartphone market share' has become pretty irrelevant: what really matters is share of phones sold, since the great majority of phones sold in the next few years will be smartphones.
With that in mind, I offer two charts of the state of the industry today. The first is for Apple alone. In Q4 2012, it had 11% of all phones sold on Earth, the highest it has ever had. Share of smartphones, the legacy statistic, was stable over the cycle, as it has been for several years. (NB: these are not adjusted for Apple's 'short quarter', so the Q4 2012 number is skewed down.)
The second chart shows the context: the utter dominance of the handset business by Apple and Samsung. As should be obvious, Apple's lock on the high-end of the market has disproportionate effects on share of revenue and profit.
It occurred to me at MWC, incidentally, that one could characterise the Android market as 'Samsung and the Seven Dwarves': this may show why.