I am getting daily scam calls on my mobile. They’re not usually 08 numbers (which I wouldn’t answer) - they’re landlines, often quite local to me, or mobiles. I’m never sure if it might be a genuine call but they always either say nothing or ask for a random name. I hang up and block the number but then I’ll get another one. I do avoid answering at times, but it would be better if I could stop them in the first place - is there a mobile equivalent of going ex-directory?