The No. 3 U.S. wireless service said it expects spending on the network through the end of 2008 to be at the low end of its previously announced estimates because of its, a small wireless service provider.
laptops to video game players and cameras.that Sprint wants to use to blanket entire cities, enabling wireless Internet access on everything from cell phones and
The technology is expected to support Internet access at speeds up to five times faster than typical wireless networks, though it is still slower than wired broadband such as DSL.
Some investors are concerned that Sprint is betting on a largely unproven technology. But Sprint Chief Executive Gary Forsee said the company would benefit by having an advanced network ahead of its rivals.
"We in fact will have a mobile broadband network at least two years ahead of other providers that will be out there," Forsee said at a company conference in Tysons Corner, Virginia, where Sprint is showcasing the technology.
Sprint's shares fell 43 cents, about 2 percent, to close at $18.20 on Thursday. Shares of Clearwire lost 97 cents, about 4 percent, to close at $22.55.
Sprint said it expects to spend $2.5 billion on the network through the end of 2008 compared with its earlier estimate of $2.5 billion to $3 billion.
Sprint expects to reach a potential 100 million customers in that time, with the company providing coverage to 70 million people and Clearwire covering 30 million people.
Sprint, which will market the new service under the Xohm brand (pronounced "zoam"), said it expects coverage to expand to 125 million people by 2010 at an additional cost of $2.5 billion, bringing total network spending to $5 billion.
But that expansion will depend on the success of the service, Sprint said.
Sprint expects its WiMax network to generate positive free cash flow beginning in 2011. Free cash flow refers to operating income excluding depreciation and amortization, but including capital expenses, working capital and other cash requirements.
It also expects between $2 billion and $2.5 billion in revenue from WiMax in fiscal year 2010.
Last month, Sprint said it would cut the initial costs for building the network through its partnership with Clearwire. The two companies plan to connect their services and allow customers to move between their networks.
Sprint also has an agreement to featuretailored to WiMax devices.
Barry West, president of Sprint's high-speed wireless unit, said in a presentation that the company has commitments from device makers to embed 50 million units in the United States with WiMax connections over the next three years.
Sprint has previously announced the top three mobile phone makers as technology partners for itsnext year. They are Nokia, Samsung Electronics and Motorola.