AT&T Inc. is adding cell phones running Google's Android operating system to its lineup, bringing what could be the iPhone's greatest rival into the fold of the device's sole U.S. carrier.

AT&T said Wednesday it plans to sell five Android phones from Dell, HTC and Motorola during the first half of this year.

Speaking at an event ahead of the International Consumer Electronics Show in Las Vegas, AT&T's head of consumer services, Ralph de la Vega, said AT&T also will sell phones running Palm Inc.'s WebOS operating system in the first half. Palm offers two phones with that software, the Pre and the Pixi. Both have been offered in the U.S. only by Sprint Nextel Corp.