Three owners of Palm's Treo 600 and 650 hybrid phone/personal digital assistants (PDAs) have filed a lawsuit claiming the devices are inherently defective.

They are asking for an injunction barring the sale of the devices.

The three owners, Mario Palza, Charles Boulais, and Nissa Gay, claim that their Treo 600 and 650 devices suffer from a host of problems such as the quality of phone calls and the stability of the software on the device. They filed a complaint with the Superior Court for the State of California, Santa Clara County, last Friday seeking damages and a recall of the Treos.

The plaintiffs claim that phone calls placed by the Treo 600 were indecipherable because of the poor quality of the phone's speakers and choppy delivery of the user's voice, according to the complaint. Gay cited problems with the Treo 650's software, claiming the device crashed up to ten times a day.

The plaintiffs believe these problems afflict numerous Treo owners and are attributable to Palm, not the wireless carriers that sell the device, said Ira Rothken, an attorney with Rothken Law Firm and co-lead counsel for the plaintiffs, in an interview Wednesday. Each of the plaintiffs attempted to resolve their issues through Palm's customer support office, but they claim that Palm would replace their Treos with equally defective models, Rothken said.

A Palm spokeswoman did not immediately return a call seeking comment on the lawsuit.