what is smartphone

A smartphone is a device that lets you make phone calls, but also adds in features that you might find on a personal digital assistant [PDA] or a computer ,such as the ability to send and receive e-mail and edit Office documents ,PDF reader etc. 
                     In compared to ordinary cell phones, smartphones allow user  to choose the applications  they want to install and use. This means that users can personalize their applications in their smartphones to makes their lifestyle and job effective and cool.
               Ordinary cell phones limit the applications that a user can use  the applications that come with the phone. With smartphones, users can choose their own applications such as calendar, phonebook, organizer, etc. In this way, a smartphone can be a cell phone with PDA feature.