WHAT IS A MOBILE
What is a mobile. A mobile phone , cellular phone, cell phone , cellphone , handphone , or hand phone , sometimes shortened to simply mobile , cell or just phone , is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area. The radio frequency link establishes a connection to the switching systems of a mobile phone operator , which provides access to the public switched telephone network (PSTN). Modern mobile telephone services use a cellular network architecture and, therefore, mobile telephones are called cellular telephones or cell phones in North America. In addition to telephony , digital mobile phones ( 2G ) support a variety of other services , such as text messaging , MMS , email , Internet access , short-range wireless communications ( infrared , Bluetooth ), business applications, video games and digital photography .