Introduction

A mobile phone (also known as a cellular phone, cell phone and a hand phone) is a device that can make and receive telephone calls over a radio link whilst moving around a wide geographic area. It does so by connecting to a cellular network provided by a mobile phone operator, allowing access to the public telephone network. By contrast, a cordless telephone is used only within the short range of a single, private base station.

Cell phone companies

Claro:
Claro Argentina is a mobile phone company, owned by Mexico's America Movil, which operates mobile phone services in that country. Born in March 2008, replacing the trademark CTI Movil, which had been acquired by America Movil in 2003.

Personal:
Telecom Argentina is an Argentina-based company telecommunications. Commenced operations on November 8, 1990 when the Argentine government, through international competitive bidding, awarded the telecommunications system in the northern region to Nortel Inversora SA (Nortel).

Movistar:
Movistar is a major Spanish mobile phone operator owned by Telefónica S.A.. It operates in Spain and in many Latin American countries. It is the largest carrier in Spain with 22 million customers (cellphone services only) and 41.58% of market share.2 Its principal competitor in Latin America is America Movil. It offers GSM 900/1800 MHz (2G), UMTS 850 & 1900 MHz (3G) and HSDPA (3.5G) services.