Harrigan’s Phone” to the relatively short list of really good Stephen King adaptations, garnishing a coming-of-age story with understated hints of the supernatural and thoughtful rumination about cellphones that finds true horror in their ubiquity. In one highly amusing ramble, Mr. Harrigan rattles off every terrible thing that the cellphone might unleash, calling it “a gateway drug” for all manner of societal ills, including the dissemination of bogus news. Harrigan’s Phone” exhibits a level of restraint not regularly associated with the movie’s two high-profile producers, Ryan Murphy (“American Horror Story”) and the prolific horror maven Jason Blum. (Whether the movie promotes Apple’s flagship product while decrying its effects will likely be, to reference another “Twilight Zone,” in the eye of the beholder.) Harrigan’s Phone” premieres October 5 on Netflix.

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