Parks Associates surveyed 482 iPhone 4S owners and found that 87 percent of respondents use voice assistant Siri at least once a month. Most people (55 percent) are satisfied with the service and use it to make phone calls and send text messages. About a third of users, however, are not using all of Siri's features like playing music, sending email and scheduling appointments.

If you fit the above profile and you're not sure what else you can do with Siri, check out this lengthy primer to the service by our own Erica Sadun.

[Via The Wall Street Journal]