If it helps, Cineworld is rubbish. It's a very sterile atmosphere there in my opinion, it's like watching a film at Tescos or something. Also the idea of turning your phone off appears to be an alien concept, at least to the patrons of the one in Edinburgh
In my local cinema i do see people with their phones out periodically and it is annoying. During one movie someone actually answered a call, couldn't believe it.
They have security staff and ticket staff who come in throughout the movies to check all is ok.
Never seen them tell anyone off yet but it'll happen eventually.