Thanks to Sascha from PC Magazine and Gearlog for the following.
Sharp-eyed cell phone geeks may have gotten a jump on the mind-bending twist at the end of Lost last night. Both product coordinator PJ Jacobowitz and I jumped a little when we saw these two shots in last night's flashback sequence of Dr. Jack Shepard talking on his mobile phone.
The surprise, of course, is that the flashback sequences in the finale weren't a flashback - they were a flash forward. And if you recognized Jack's black Motorola KRZR K1m, you would have known this too (or thought the creators completely screwed up.)
LOST's island sequences are set in late 2004; all the flashbacks are from before 2004. But the KRZR wasn't released until October 2006. So there's no way anyone in a flashback could be wielding a KRZR. The KRZR guy had to be two years in the future.
Now, that doesn't solve other mysteries, like, who was the dead guy in the casket? We're both betting on Ben.
Source: Gearlog