That number came via a report issued on Thursday by Analysys International. The report combines estimates from both devices sales and ownership.
That figure is now 90.1 percent, up from 83 percent in Q2 and up from 58.2 percent in Q3 of 2011. Since the data doesn't include clone phones, it's possible the market share is even higher, as many knock-offs use Android as it is open source.
On the other hand, the research also doesn't include grey market iPhone 5s. Since the iPhone 5 is still not officially available in China, many have resorted to having iPhone 5s smuggled in from Hong Kong. That said, iOS dropped from 6 percent in Q2 2012 to 4.2 percent in Q3 2012.
Nokia continued to see its global influence wane, though, as it saw Symbian drop from 6 percent in the second quarter to 2.4 percent in the third.
Ironically, although Google's smartphone platform has a near-monopoly in China, the Internet giant can't fully leverage that market share. Many of Google's services are block or restricted in China.