More cell phones than ever were shipped in the fourth quarter, with the industry growing 24 percent over the same quarter last year, the technology research firm IDC reported.

Nokia (news – web sites) Corp.’s introduction of nine new models helped the Finnish phone maker maintain its market-leading position, although No. 2 Motorola Inc. grew at a faster rate on the strength of its own new models, IDC said.

Global shipments of mobile phones reached 194.3 million units in the October to December period, breaking the previous record of 164.5 million set in last year’s third quarter, IDC said. Shipments increased 18.1 percent from the third quarter to the fourth.

Cell phone shipments also broke a full-year record in 2004, with 664.5 million units shipped compared with 513.8 million in 2003, for a 29.3 percent gain.

Nokia’s fourth-quarter market share was 34 percent, with 66.1 million units shipped, up nearly 29 percent from the previous quarter, IDC said. Nokia’s full-year market share for 2004 was 31.2 percent.

Schaumburg, Ill.-based Motorola strengthened its No. 2 market position with a 16.4 percent share last quarter and a 36.5 percent increase in shipments compared with the previous quarter. Motorola launched more than 20 new devices, including its heavily marketed RAZR V3.

No. 3 Samsung spent most of 2004 closing in on Motorola, but fell further behind in the fourth quarter with a 7 percent decline in shipments compared with the previous quarter. The drop left the South Korean company with a 10.9 percent share.

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