Research firm comScore this afternoon reported mobile phone subscriber statistics by device and by platform for the U.S. for the three months ending January, based on a survey of 30,000 individuals.

Samsung Electronics (005930KS) captured the top spot in total mobile phone usage by vendor, with 25.4%, though that was down by 10 basis points from the October-ending three month period. Apple (AAPL) was the only vendor picking up share, rising 2 percentage points to 12.8% of all mobile phone usage, comScore reports. That gave Apple fourth place behind Motorola Mobility (MMI), at third place with 13.2% share, down 40 basis points, and LG Electronics (06657011KS), which dropped almost 1 point to 19.7%, for second place.

In terms of smartphone platform share, comScore relates that Google‘s (GOOG) Android operating system gained a little over 2 percentage points, for 48.6% share, while Apple’s iOS gained 1.4 points, at 29.5%.

Research in Motion (RIMM) lost 2 points of share by platform, for at 15.2% share, at third place, and was flat in terms of device share, at 6.6%, in fifth place behind Apple.

Fin