An Apple employee lost the iPhone 5 at Cava 22 in San Francisco in late July. The device may have been sold on Craigslist for $200, CNET reported.
Apple representatives contacted San Francisco police shortly after the loss, saying the device is priceless, but did not file a report.
Jose Valle, owner of the restaurant, said neither the police nor Apple have contacted him about the phone, but he was called several times by a man about a lost iPhone. Valle told the man he had not found it, but would alert him if he did.
"I guess I have to make my drinks a little less strong," Valle said.
Last year, Robert Gray Powell, an Apple computer engineer, left an iPhone 4 prototype at a beer garden in Redwood City, Calif.
The phone was bought by the gadget blog Gizmodo for $5,000 cash, CNET said.
In early August, San Mateo prosecutors filed theft charges against Brian Hogan and Robert Sage Wallower for allegedly selling the prototype to the blog. The two were arraigned Thursday and pleaded not guilty. A pretrial conference was scheduled for Oct. 11.
Wallower told CNET in an interview in 2010: "I didn't see it or touch it in any manner. But I know who found it."