No more cell phones from Motorola?

The newly appointed Brown further spooked investors by saying during the conference call with analysts and investors that a turnaround of the handset division would "take longer than expected." Motorola had been counting on reviving its handset business in 2008, but Brown said that the division wouldn't likely regain footing until sometime in 2009. The news sent the company's stock tumbling more than 20 percent.

Over the past year, Motorola's market share has steadily been slipping, and by midyear it had dropped from the No. 2 cell phone company in the world to No. 3, ceding second place to Samsung.

Meanwhile Motorola's rival Nokia, which is No. 1 globally, grew its market share to 40 percent in the fourth quarter of 2007 by selling high-end handsets like the Nseries as well as low-end handsets for the rapidly growing developing market. Not only has Nokia increased its market share, but the company has also boosted profits 44 percent to US$2.68 billion.

Faced with such bleak news, Motorola finally seems to be taking bold action to jump-start its turnaround. While more than 50 percent of Motorola's revenue comes from handsets, the company also makes TV set-top boxes and other telecommunications network equipment used in the home. It also makes public-safety radios and handheld devices designed for government and enterprise workers.

Icahn, who has long called for the company to be split apart, says Motorola's stock is undervalued. He believes that splitting the company into pieces would unlock nearly US$20 billion in shareholder value.

But some industry analysts caution that such a move could backfire, especially if Motorola sells its handset division without the Motorola brand name.

"The Motorola brand is most associated with the handset business," said Roger Entner, senior vice president of the communications sector at IAG Research. "Fundamentally it's a good business. Of course, management has made some poor choices and there's been poor execution. But without the name, it's not worth much."

As an example of how things can go horribly wrong, Entner points to Siemens' sale of its handset business to the Taiwanese company BenQ in 2005. A year later, BenQ Mobile, which had been set up to handle the brand business, went bankrupt in 2006, and with it went the rest of Siemens handset division.

Entner believes a better strategy for Motorola would be to split into three separate companies, while keeping the Motorola brand associated with the handset business.

"Motorola is a consumer name," he said. "The handset division without the name is Siemens and BenQ all over again. And you saw what happened to them."

This story was first published on CNET News.com.