Roaming is a general term in wireless telecommunications that refers to the extending of connectivity service in a location that's different from the home location where the service was registered. The term "roaming" originates from the GSM (Global System for Mobile Communications) sphere. Traditional GSM Roaming is defined (cf. GSM Association Permanent Reference Document AA.39) as the ability for a cellular customer to automatically make and receive voice calls, send and receive data, or acce… (More on Roaming)