Apple’s iPhone maintained its number two position in the US smartphone market during the three-month period ending January 31, 2010, according to market research firm comScore. Apple had a 25.1 percent share of subscribers, while RIM had 43 percent. Apple was up 0.3 points from the previous quarter, while RIM was up 1.7 points.

Microsoft came in third with 15.7 percent, Google fourth at 7.1 percent, and Palm fifth at 5.7 percent.  Looking at all mobile subscribers, Motorola was number one at 22.9 percent, followed closely by LG and Samsung at 21.7 and 21.1 percent, respectively, and Nokia and RIM in distant fourth and fifth places.

comScore also looked at overall mobile usage and found that text messaging was still the dominant activity, at 63.5 percent, while web browsing was second at 28.6 percent, gameplaying third at 21.7 percent, and downloaded app usage fourth at 19.8 percent. None of the activities saw a major change from the previous three months except access to social networking sites or blogs, which leaped from 13.8 percent last time to 17.1 percent this time.