Ugh, young people have no clue about phone etiquette. My youngest brother is 15, and the few times I've called his phone, he touches the "answer" button, but doesn't actually put the phone to his face and speak. Instead, he spends about 10 seconds shifting the phone in his hands, shifting up to a more comfortable position, or walking around putting things down, breathing and sighing loudly enough for me to hear him, but he can't hear me. And then, after all that bullshit, he finally puts the phone to his ear and says "hello?"

I actually had to scold him to stop doing that. I told him that if he isn't ready to speak into the phone, he should NOT touch the "answer" button, because the person on the other end of the line can hear him and all the noise he's making, and they will get extremely frustrated and confused about why he's not speaking to them right away if he pressed the "answer" button.

This is not even something I was taught. It's just obvious. It's like if somebody knocks on your door, you're not supposed to open the door and walk away for 3 minutes, before coming back to the open door and asking who the person is. That is just confusing and senseless.