Despite relatively positive reviews of its Windows Phone mobile operating system, Microsoft is still having a hard time grabbing marketshare from its key rivals. According to comScore, Microsoft’s smartphone market share dipped by one percent during the three-month period ending in January.

Microsoft now controls just 4.4 percent of the smartphone market in the U.S., down from 5.4 percent for the three-month period ended in October. Those results comes event as the smartphone market topped 100 million users in the U.S, a 13 percent increase over the period ended in October.

Google remains at the top of the heap, with growth of 2.3 percent and market share of 48.6 percent. That was followed by Apple, which saw growth of 1.4 percent and market share of 29.5 percent. ComScore also found that Samsung was the No. 1 smartphone maker, showing 25 percent. That was followed by 19.7 percent for LG; 13.2 percent for Motorola; 12.8 percent for Apple; and 6.6 percent for RIM.

Here’s a look at the results of the comScore study:

Like what you're reading? Subscribe to GeekWire's free newsletters to catch every headline

Job Listings on GeekWork

Find more jobs on GeekWork. Employers, post a job here.