mobile phones still exist

Sorry to dredge up such a dead horse issue for another round of beating.

In a one-day training session, a couple of people answering mobile phones.

I don't necessarily have perfect mobile phone etiquette (but considering how little I use the thing, the impact either way is minimal), but I let one call vibrate into the ether because the teacher was explaining something to me, and stepped outside to take another that seemed important. Others, however, felt it sufficient to move towards the back of the class. Yes, converse amongst yourselves.