Weird phone calls

Holly has a TOY cell phone. It sometimes randomly rings after she's been playing with it.
Well, my grandmother died last week and later that same day that toy phone rang. (Holly had been playing with it a little while before) I felt kind of creeped out and a little silly but I thought, dammit I'm not going to miss a call from my grandmother. So, just in case, I picked up the toy phone and answered "Hello." Teehee... there was no response.