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Politicians and privacy experts demanded answers of Google and Apple Friday following the discovery that smartphone software from the tech giants regularly transmits information about a user's whereabouts back to the companies.

A group of iPhone and iPad users have sued Apple Inc alleging that certain applications (apps) were passing personal user information to third-party advertisers without consent, a court filing showed.

Google blasted Apple's new rules for its iPhone and iPad operating system, saying the changes would prohibit application developers from using Google's advertising technology on the devices.

Some of Apple's iPhones and its new iPad devices will soon be able to run more than one program at a time, something that phones from Apple's rivals already offer and that iPhone owners have long sought.

CEO Steve Jobs announces the iAd advertising network among features coming this year to its iPhone, iPad and iPod Touch line, aiming to tap into an infant market with huge potential.

In a direct attack on Silicon Valley rival Google Inc., Apple Inc.

Surprise. Apple has agreed to purchase mobile advertising startup Quattro Wireless for $275 million, All Things Digital reported Monday. That Quattro would be targeted after Google bought rival mobile ad seller AdMob for $750 million by Google last year is no surprise.