Not including an option for Symbian is going to screw up their figures, at least for non-US respondents. Symbian phone users are either going to pick "non-smart

Not including an option for Symbian is going to screw up their figures, at least for non-US respondents. Symbian phone users are either going to pick "non-smartphone", which is misleading, or more likely skip the survey, which means a hefty response bias. I've sent them an email to this effect; you might want to as well. Edit: I checked again and the form now has a Symbian option.