Apple's iPhone has jumped +2% to 36.3% of the U.S. smartphone market share in December 2012, comScore's latest data suggests.
In that same period, Google's Android rose +0.9% to 53.4%, retaining its first place by a large margin, while BlackBerry and Microsoft's Windows Phone lost a good chunk of their market share: -2% and -0.7%, respectively.
Symbian's market share has stayed the same in December: 0.6%.
On the manufacturer front, Apple did well, jumping +2% to 36.3%, as did Samsung, with an even bigger gain: +2.3% to 21%.
HTC and Motorola both lost market share (-1.8% and -0.7%, respectively), while LG posted a modest gain: +0.5% to 7.1%.
If you're wondering why Apple is doing so well (in January, Samsung had a sizeable lead over Apple), it's because comScore has switched to measuring smartphones only, so all the above figures relate to those devices.
With smartphones having a 54% mobile market penetration in the U.S. in December 2012 (up 5% since September 2012), it's an understandable move, but having an insight into the overall mobile market share would be interesting as well.