What is the Audience of a device?
The people that will be using the device.
What is the purpose of a device?
How the audience will use the device.
Wants.
Something the user wants on their device but is not absolutely necessary, i.e. a big screen, fast processor.
Needs.
Something about the device that the user absolutely needs, i.e. Wi-Fi access, SMS.
Factors to consider when choosing a device.