If my DH doesn't pick up when I phone will always ask him, 'why didn't you pick up,' when he answers the second time or when he phones me back.
I admit I will always ask him and will always reply with either I didn't hear or I was busy.
Last week I asked him the same question and he told me I was annoying him with such infantile questions and it was better I never phone him again if I was going to ask that question again
i think he is being unreasonable. It's a standard question to ask.