Happens ALL the time
OK, Mr. movie-review-guy, what is it, exactly, about the story of a woman kidnapped in her attic who manages to re-wire her smashed-to-bits phone so that it calls a young strapping guy she doesn't know on his cell phone, in a way that ensures it won't work again so she can't hang up, and convinces him that she is in trouble and he must come to her rescue personally, that's so freaking implausible??
It's just like a cross between "Speed" and "Phone Booth" right? Two films known especially for their real-life probability. In this case, the bus is played by a cell phone.
But really this exact scenario has happened to me at least twice. Now I just keep my phone off.