Help identifying an old movie by the trailer.

Hi I'm from Colombia. When I was a kid (1998- 2008) I remember seeing the trailer of a movie, but I have no idea what movie was.
The trailer was something like this:
A man wakes up and finds himself in the desert. He calls a friend on his phone. Later, it's revealed that the person who made the call is actually in the hospital. The friend who received the call is confused because he doesn't understand how it was possible to talk to him when he was actually in the hospital. 
Do you know what movie was this one?