Depends what you mean by great, but there were a number of phones with 2-3mp cameras, more than sufficient for a whiteboard.

And regardless it was an interview structured with a whiteboard, cameras (digital or not) had been things for a while, the company could gave provided one.

My Sony Ericsson K750 took pretty nice 1.3 MP photos for the time (launched 2005), it was better than my 1.3 MP Olympus Camedia C-860L from ca five years prior and was my main camera until DSLRs got cheap enough.

Nokia 7650 was released in 2002 it had camera, though picture quality is not great.