Respuesta :
The answer is:
peer pressure
When all of your other friends have a cell phone, you would most likely want to purchase one because you want to stay in touch with the social circle.
price of the phone
People have their own incentives to buy cheap or expensive phones. Those who buy cheap phones would most likely buy it to save their money. Those who buy expensive phones most would most likely aim for their functionality or social status.
advertising
Advertisement influence product awareness. Phones company that constantly do good advertising would make their products become more likely to be purchased.