Mobile operating system market share, Feb 2012 from iCrossing. For comparison, see 2011’s numbers. Some standout numbers:

Japan 2011 > 2012

• iPhone 58% > 48%
• Android 23% > 46%
• WAP 12% > 2%
• Other 7% > 4%

China 2011 > 2012

• Nokia 59% > 40%
• iPhone 11% > 12%
• Android 3% > 22%
• Other 27% > 26%

Anecdotal, but per my experience I would think that “Other” in Brazil is eaten up by grey market iPhones.