According to figures for January, Apple is close to becoming the third largest mobile manufacturer in the region, with its share jumping 2 percentage points between October and January, finishing between 12.8 percent.
The big three
That puts Apple 0.4 percentage points behind Motorola, which continued to lose ground in the region, falling to a 13.2 percent share.
Indeed, all three main Android OEMs lost ground at the end of 2011, comScore reports, with market leading Samsung falling by 0.1 percentage points and rival LG falling back by 0.9 percent.
Of the top five manufacturers, only Apple expanded its share during the three month period, with RIM finally stopping the rot on a 6.6 percent share.
Despite the three big Android manufacturers losing ground, however, comScore which surveys 30,000 mobile subscribers in the US to arrive at its figures doesn't believe the OS itself has suffered as a result.
Expanding Android
During the three month period, Android's share grew by 2.3 percent to a market leading 48.6 percent. Apple's iOS, however, is also growing, up by 1.4 percentage points to 29.5 percent.
In all, there are now 101.3 million smartphone subscribers across the US, up 13 percent since October.
You can read the results in full over on comScore's website.
