Edited sentence: 39) as the ability for a cellular customer to automatically make and receive voice calls, send and receive data, or access other services, including home data services, when travelling outside the geographical coverage area of the home network, by means of using a visited network.GSM Association Permanent Reference Document AA.In wireless telecommunications, roaming is a general term  that refers to the extending of connectivity service in a location that is different from the home location where the service was registered.The term "roaming" originates from the   GSM (Global System for Mobile Communications) sphere; the term "roaming" can also be applied to the CDMA technology, see CDMA Roaming.Traditional GSM Roaming is defined (cf