The series ended in 2002. Were cell phone cameras really "standard fare" at that point? I had my first cell phone in 2005, and I honestly can't remember it having a camera, but maybe I'm just getting old.
Oh yes, I had a phone with a (no doubt rudimentary) video camera around then, and if I did you can take it as red basic camera phones were avaliable as I'm always a late adopter. Especially as, thanks to the joys of product placement, Mulder and Scully always had top of the line phones.