Huh. I don't actually mind this one, insofar as it presents the phone booth as an object abandoned in the modern age. It reminds me of stories like British phone booths being decommissioned and turned into defibrillator storage. Phone booths are a sort of vestigial organ in the modern cityscape, too new to be historic and too old to be useful. Thus they are appropriate as a site of horror.
I don't think you could do this story with something like a call coming from Scam Likely (too modern, too silly).
Usually this kind of story only takes the person. The fact it takes the object they were touching and leaves it in the phone booth makes it a touch creepier.
Also did anyone else think the futons were basically a mound of flesh at first?