I can't tell if they had multiple people trying to complete each task on each phone, or if they had only one shot per phone.
Plus adding contacts and dailing a number, aren't really common tasks on a smartphone, are they??
On the iPhone, it seems the user didn't have to select a person to send the txt too.
Love the Benny Hill music, but for a study, don't you need more than one person per phone per task? Would it have been too hard to get 5-10 people per phone per task?