you're hard pushed in the UK to find somewhere with absolutely no signal on a phone... as for "unplugging" it's all well and good until some sort of emergency then you're screaming at the sky for some sort of communication.
Yes they could be handy, but I have to do without. I guess I like knowing that if my wits aren't about then I can find myself in a spot of bother. Forces one to be constantly aware at all times. I've fractured both ankles, so every step I take now is thought out and placed with care haha. I can make a crutch in record time no problem haha.