The iPhone’s interface is built around the multi-touch screen which includes a virtual keyboard. The iPhone has Wi-Fi and can connect to cellular networks and thus browse the Web and use email features. It can take pictures, shoot video and play music. Other iPhone’s functions include GPS navigation, possibility to perform mathematical calculations, receive visual voicemail and more.Many other features can be added by downloading application programs, better known as apps, which will allow user to play games, be part of social networks, etc. iPhone apps can be installed from the App Store synced from iTunes, or by using the third party installers for the apps not authorized by Apple). You’ll need an Apple ID to use the App Store or iTunes.