SAN FRANCISCO — Google Inc. wants to become as influential in the mobile market as it is on the Internet — and the online search leader thinks it can do that without sticking its prized brand on a cell phone.
The Mountain View, Calif.-based company provided the first glimpse at its mobile ambitions Monday, announcing a free software package scheduled to hit the market during the second half of next year.
The system, which will control an untold number of cell phones, is designed to unify the developers of mobile applications around a common platform that makes it easier and more enticing to surf the Web on cell phones. The new package is called "Android" in tribute to a Silicon Valley startup that Google acquired two years ago to steer its secretive project.
Google is hoping Android opens another lucrative channel for peddling ads and services to people when they're away from their personal computers, supplementing the revenue already pouring into the company from Internet advertising.
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Contrary to reports that surfaced during months of breathless speculation, Google isn't making cell phones, nor does it plan to put its name on the devices equipped with its software. Instead, it will work with four manufacturers and 29 other companies that have formed the Open Handset Alliance to help launch Google's mobile software.
But Google Chief Executive Eric Schmidt hinted the company might eventually make its own phone powered by the new software. "We don't want to foreclose any options in the future," Schmidt said during a Monday conference call.
For now, Google is focused on rallying support for Android, which relies on openly available computer code that gives equal access to all programmers.
That freedom is meant to foster innovation and new uses for the sophisticated handsets known as smart phones.
"You will be able to do amazing things with your mobile device that you had never thought of before," Schmidt promised.
Google will release a tool kit for developers next week. Consumers will have to buy a new phone to get the Google software, because Android was not designed for existing handsets.
Even with its market debut months away, Android looms as a significant threat to other mobile operating systems made by Microsoft Corp., Research In Motion Ltd., Palm Inc. and Symbian, which is owned by Nokia Corp. and several other major phone makers.
Because Android will be free, it could undercut rival operating systems that handset makers must buy.
"This is a shot that is going to be heard around the world, but it's just the first shot in what is going to be a very protracted battle in the next frontier of the mobile Web," said Michael Gartenberg, a Jupiter Research vice president.
With 3 billion cell phones already on the market, Google wants to make sure people can use its services, such as the search engine, e-mail and maps, on mobile handsets as easily as on personal computers.
But major wireless carriers zealously control which services can be accessed in an effort to maximize their own profits.
"Google had to find a way to create an open environment that is more like the one they are used to dealing with on the Internet," said Charles Golvin, principal analyst for Forrester Research.
So far, Motorola Inc., Samsung Electronics Co., HTC and LG Electronics Inc. have agreed to use Android in some of their phones.
Key details, like how much the Android-powered phones will cost and how many units will be shipped, have yet to be worked out. Executives for both Motorola and HTC said their companies will keep making phones equipped with other operating systems, such as Windows Mobile.
The wireless carriers that have agreed to provide service for the Google-powered phone in the United States include Sprint Nextel Corp. and Deutsche Telekom's T-Mobile.

