A mobile phone with an advanced operating system that contains features of a PC operating system with other attributes is called smart phone. The phone which has the options to place and receive voice calls and send and receive SMS,MMS with those of other popular digital portable devices like personal digital assistants (PDAs), such as an event schedule, media player, games, GPS navigation, HD camera, High definition video, Bluetooth and wi-fi . Smartphone can access the Internet and can use a variety of applications from places like Google Play Store or Apple App Store. They typically have a color display with a graphical user interface and almost are touch screen.
There are numbers of operating system for Smartphone which are Android, iOS, Windows 10 Mobile, Tizen, Sailfish OS, Ubuntu Touch, BlackBerry 10, BlackBerry OS, Windows Mobile, Symbian, Firefox OS, Bada, webOS, Palm OS, MeeGo/Maemo/Moblin.
Most popular applications for smart phone are Youtube, Facebook, Linkedin, Twitter, Shareit, Whatsapp messenger, Viber, imo, Instagram and Hotstar TV.