When Mr. Harrigan dies, the teen who befriended and did odd jobs for him, puts his smart phone in his pocket before burial and when the lonely youth leaves his dead friend a message, he is shocked to get a return text.
 
The film's ending will not compare to the one you will be imagining in your mind.  Nuff said.
 
FUN FACT:  The Red Devil lottery tickets are a nod to the red devil killer in the Scream Queens series, which is also a Ryan Murphy production.