The IPhone 4 has only a simple mobile operating system.
A smartphone is a mobile personal computer with an advanced mobile operating system with features useful for mobile or handheld use .. personal computer. personal computer. mobile operating system. mobile operating system. Smartphones , which are typically pocket-sized -LRB- as opposed to tablets , which are much larger in measurement -RRB- , have the ability to place and receive voice / video calls and create and receive text messages , have personal digital assistants -LRB- such as Siri , Google Assistant , Alexa , Cortana , or Bixby -RRB- , an event calendar , a media player , video games , GPS navigation , digital camera and digital video camera .. tablets. Tablet computer. text messages. text messaging. Siri. Siri. Google Assistant. Google Assistant. Alexa. Amazon Alexa. Cortana. Cortana ( software ). Bixby. Bixby ( virtual assistant ). media player. portable media player. video games. video games. GPS navigation. GPS navigation device#Mobile phones with GPS hapability. digital camera. Camera phone. digital video camera. digital video camera. Smartphones can access the Internet through cellular or Wi-Fi and can run a variety of third-party software components -LRB- `` apps '' from places like Google Play Store or Apple App Store -RRB- .. Internet. Internet. cellular. cellular. Wi-Fi. Wi-Fi. apps. mobile app. Google Play Store. Google Play Store. Apple App Store. Apple App Store. They typically have a color display with a graphical user interface that covers more than 76 % of the front surface .. color display. Flat-panel display#color. graphical user interface. graphical user interface. The display is almost always a touchscreen and sometimes additionally a touch-enabled keyboard like the Priv / Passport BlackBerrys , which enables the user to use a virtual keyboard to type words and numbers and press onscreen icons to activate `` app '' features .. touchscreen. touchscreen. virtual keyboard. virtual keyboard. In 1999 , the Japanese firm NTT DoCoMo released the first smartphones to achieve mass adoption within a country .. NTT DoCoMo. NTT DoCoMo. Smartphones became widespread in the late 2000s .. Most of those produced from 2012 onward have high-speed mobile broadband 4G LTE , motion sensors , and mobile payment features .. 4G LTE. LTE ( telecommunication ). mobile payment. mobile payment. In the third quarter of 2012 , one billion smartphones were in use worldwide .. Global smartphone sales surpassed the sales figures for regular cell phones in early 2013 .