You wanna try cragging up at Stanage or elsewhere The Peak. I've not been for ages but in the olden days phones would ring in bags all along the crag, only the owners weren't near their bags - they were halfway up Flying Buttress or whatever. I saw someone grab a particularly noxious unattended phone and fling it into the bracken once.
I can't hack the idea that people are convinced they're so important that the world can't manage without them. Sure if your missus is in the last 4 weeks of pregnancy or one of about five other scenarios where you would still chose to go out then turn your phone on but don't pretend that you're so frickin important that the world's about to grind to a halt.
Me - I prefer places where the phone doesn't work - cut the apron strings ya big babies.