Both obsessed with and shrine are well worth a listen! I enjoy both, shrine does a bit more speculation, obsessed with seems a little less analytical.
Re the phones, I read The Governor by Vanessa Frake recently, she's a former governor at wormwood scrubs, and she spoke about how phones are the most problematic contraband in prison and they go to great lengths to stop the prisoners having them but they go further and further in efforts to get them in. She spoke about one visitor bringing in five phones during one visit.
I was fairly shocked by the number she'd concealed up herself when I read the book and only marginally less so now I have seen the tiny arse phone!