Flying home from abroad recently I noticed the woman accross the aisle from me using her mobile phone. After a while I tapped her on the arm and sais, 'excuse me, but you're suppose to have that turned off.' She replied, 'not neccessarily.' and carried on using it. Whenever the hostess came by she hid it under her handbag. then she brought out a second one and started using that too. All the time we were landing she continued to text. I've been kicking myself ever since for not alerting the crew to her actions. Won't be such a wimp in future that's for sure!