[HPforGrownups] OoP: Phone booth and Snape (unrelated)

[T.M. Sommers]

No: HPFGUIDX 65980

rayheuer3 at aol.com wrote:
> 
> kiatrier at yahoo.com writes:
> 
> > You go into a phone booth, dial a number, someone picks the
> > phone up and suddenly you are in another world. Works for both
> > TM and HP. Coinicidence or reference?
> 
> Bah.  They both stole it from a sitcom called "Get Smart".

So why didn't Harry call Sirius on his shoe phone?