I Don't Answer the Phone When I Don't Want to

I never answer the telephone when it's inconvenient, and never at meal times. The number of times I get "I phoned earlier - where were you?". Then if I say where I was, "Surely you could hear the phone from there. Why didn't you answer? I wanted to speak to you."
Well - you have my attention now and you just spent the last two minutes quizzing me as to my whereabouts, so it can't have been anything important.
And beware cold callers trying to sell me something when I do answer. I have an interesting lecture to explain that my telephone is for my own convenience for speaking with friends and family - not a free for all advertising tool for all and everyone who want's to sell me something.