Yahoo said it would add new voice-enabled features to its mobile platform to make Web search easier to cellphone users.

The new OneSearch 2.0 technology will let consumers use voice commands for search services beyond current mobile voice recognition systems. The service will allow wider searches for locations, restaurants, flight information, Web sites, news or local listings.

Yahoo mobile voice searches may take as little as five seconds to recognize the search and to return the results to the device on conventional networks and from 10 to 20 seconds on slower networks.Yahoo plans to introduce the service on 500 different devices and international markets by the end of the year. Consumers will be able to download OneSearch at m.yahoo.com/voice.The company, which predicts there will be more than 40 times more mobile devices than PCs by 2010, expects to monetize OneSearch and other mobile services such as instant messaging or e-mail through advertising.