"I call it a cell phone, but, I guess mobile works too?" They had been referred to that early on, hadn't they? Was there a difference between the two? Maybe he would ask Sam later. "Rotary phone? Dude, those things were awful, why would you want to use one of them? It was such a pain in the ass, because if you messed up a number you had to reset the the thing and start all over again. Plus, the cord would always get jumbled up and it was such a nuisance." Dean wasn't what you would call technologically savvy, but rotary phones were definitely something he didn't miss.
"Yeah, right, Castiel." Dean replied with a nod and moved to take a step back from the table to give the other some space. "I just would have liked to talk to him or whatever, I don't know."