Both Gartner and IDC have recently published their handset rankings for Q3/2010, and both have Apple moving into the #4 spot globally. That is impressive, as this is not measuring smartphones but all phones, and it is not measuring North America and Western Europe but the world.
In Smartphone-only terms, Apple has leapfrogged RIM into the #2 slot.
On a platform-basis, Apple’s iOS is now #3 behind Symbian and Android but ahead of RIM’s proprietary Blackberry OS.
Interestingly, IDC has the rankings identically but the market shares of the leading players lower, which would suggest a higher share of the “others” (which is probably unduly diminutive for such companies like Motorola, HTC or Sony Ericsson).
IDC’s smartphone numbers are here.