Mobile phone use at the pumps has been an irrelevance since we stopped using micro switches in the keypad. Now it's all thin film and inductive/pressure/whatever, there's nothing much left in a phone that can spark. Even a faulty phone won't spark, it'll just not work.
Old phones would spark and still work, so the user had no idea the phone was broken.
Also, pretty sure the vapour recovery on modern pumps has come on in leaps and bounds since the days of the 15 kilo mobile phone.
But it's law, nothing we can do about it.