Okay, so I was originally going to ask you guys if anyone knew of any surefire reason Sam might change his phone number between 2x09 and 2x21. But then the second sentence of that would-be post was "I mean, he nearly gets blown up, probably jumps into a swimming pool with his phone in his pocket, gets arrested a few times, gets possessed by Meg, and kills a bunch of things, but nothing too dire, right?"
And then I was like, THIS GUY. This guy's life. Oh Sam.
....But seriously though, there's no 100% reason he wouldn't have the same phone number, right? I mean, if you're going to bother changing the plates on your vehicle, I guess you'd probably also want to get a new phone number. But maybe not??